This analysis compares the vote the major parties received for the U.S House, Governor and U.S Senate. It would probably be more complete with some of the other statewide constitutional offices included, but I don't want to go back and get the election totals again.  I don't really know if this illuminates anything, but it looks kind of nice.

I've included the total number of registered voters and, occasionaly, the estimates of eligable voters where I could find them.  If anybody can find more, that would be nice.

The South Carolina Elections website has an awesome page with all of those figures and election turnout up to 2002: http://www.scvotes.org/statistics/south_ carolina_registration_and_participation_ compared_to_other_states

Alabama
Governor: Total votes: 1,250,401 Republican: 718,327 Democratic: 519,827
US House: Total Votes: 1,140,152 Republican: 627,501 Democratic: 502,046
U.S House candidates: 7 districts, 6 Democrats, 5 Republicans

Alaska
Registered voters: 466,258 total votes: 238,307 Turnout 51.11%
Governor: Total votes: 237,322 Republican: 114,697 Democratic: 97,238
US House: Total votes: 234,645 Republican: 132,743 Democratic: 93,879

Arizona
Registered voters: 2,568,401 Total votes: 1,553,052 Turnout 60.5%
Governor: Total Votes: 1,533,645 Democratic: 959,830 Republican: 543,528
US Senate Total votes: 1,526,782 Democratic: 664,141 Republican: 814,398
US House: Total votes: 1,493,150 Democratic: 627,259 Republican: 771,246
U.S House candidates: 8 districts, 7 Democrats 8 Republicans

Arkansas
Registered Voters: 1,738,189
Governor: Total Votes: 779,257 Democratic: 432,635 Republican: 317,603
US House: Total Votes: 768,258 Democratic: 457,899 Republican: 310,359

California
Eligable voters: 22,652,190 Registered voters: 15,837,108 total votes: 8,899,059 turnout: 56.2%
Governor: Total votes: 8,679,416 Democratic: 3,376,732 Republican: 4,850,157
US Senate Total votes: 8,541,476 Democratic: 5,076,289 Republican: 2,990,822
US House: Total votes: 8,295,816 Democratic: 4,720,164 Republican: 3,314,398
U.S House candidates: 53 districts, 52 Democrats, 46 Republicans

Colorado
Registered voters; 3,000,836
Governor: Total votes: 1,558,387 Democratic: 888,096 Republican: 625,886
US House: Total votes: 1,538,908 Democratic: 832,888 Republican: 623,784
U.S House candidates: 7 districts, 7 Democrats 6 Republicans

Connecticut
Registered Voters: 1,941,467 total voted: 1,162,391 turnout: 59.9%
Governor: Total votes: 1,123,466 Republican: 710,048 Democratic: 398,220
US Senate Total votes: 1,134,777 Independent 564,095 Democratic: 450,844 Republican: 109,198
US House: Total votes: 1,074,739 Republican: 419,895 Democratic: 648,653

Delaware
Registered Voters: 557,703
US Senate Total votes: 242,972 Democratic: 170,567 Republican: 69,734
U.S House Total votes: 251,694 Democratic: 097,565 Republican:143,897

Florida
Registered Voters: 10,433,148 total voted: 4,884,544 turnout: 46.8%
Governor: Total votes: 4,829,270 Republican: 2,519,845 Democratic: 2,178,289
US Senate Total votes: 4,793,534 Republican: 1,826,127 Democratic: 2,890,548
US House: Total votes: 3,851,942 Republican: 2,182,833 Democratic: 1,599,968 (5 districts held by Democrats weren't on the ballot)
25 Districts, 19 Democrats 19 Republicans

Georgia
Total Eligable voters: 5,133,740 Total Registered voters: 4,408,826
Governor: Total votes: 2,122,258 Republican: 1,229,724 Democratic: 811,049
US House: Total votes: 2,070,307 Republican: 1,138,048 Democratic: 932,143
U.S House candidates: 13 districts, 13 Democrats 12 Republicans

Hawaii
Registered voters: 662,728 total votes: 348,988 turnout: 52.7%
Governor: Total votes: 344,315 Democratic: 121,717 Republican: 215,313
US Senate Total votes: 342,842 Democratic: 210,330 Republican: 126,097
U.S House Total votes: 337,944 Democratic: 219,810 Republican: 118,134

Idaho
Registered Voters: 764,880 Total Votes: 458,927  turnout: 60.0%
Governor: Total votes: 450,832 Republican: 237,437 Democratic: 198,845
US House: Total votes: 445,306 Republican: 248,105 Democratic: 177,376

Illinois
Registered Voters: 7,375,688 total voted: 3,586,968 turnout: 48.6%
Governor: Total votes: 3,486,671 Democratic: 1,736,219 Republican: 1,368,682
US House: Total votes: 3,452,282 Democratic: 1,986,431 Republican: 1,442,526
U.S House candidates: 19 districts, 19 Democrats 18 Republicans

Indiana
Registered voters: 4,295,687 Total votes: 1,719,351 turnout: 40.0%
US Senate: Total votes: 1,341,111 Republican: 1,171,553
U.S House: Total votes: 1,666,922 Republican: 831,785 Democratic: 812,496
U.S Senate: No Democrat on the ballot

Iowa
Registered Voters: 2,075,571 Total votes: 1,071,509 turnout: 51.6%
Governor: Total votes: 1,053,255 Democratic: 569,021 Republican: 467,425
U.S House Total votes: 1,032,981 Democratic: 492,937 Republican: 522,388

Kansas
Registered Voters: 1,663,017 total votes: 864,083 turnout: 51.96%
Governor: Total votes: 849,700 Democratic: 491,993 Republican: 343,586
US House: Total votes: 845,127 Democratic: 369,191 Republican: 459,267

Kentucky
Registered Voters: 2,766,288
U.S House: Total votes: 1,253,526 Republican: 611,780 Democratic: 601,723
U.S House: 6 districts, 6 Democrats 5 Republincs

Louisiana
U.S House: Total votes: 902,498 Republican: 579,702 Democratic: 295,762
U.S House: 7 districts 6 Democrats 7 Republicans

Maine
Governor: Total votes: 550,865 Democratic: 209,927 Republican: 166,425
US Senate Total votes: 543,981 Democratic: 111,984 Republican: 402,598
U.S House Total votes: 535,935 Democratic: 350,721 Republican: 163,165

Maryland
Registered Voters: 3,348,207
Governor: Total votes: 1,788,316 Democratic: 942,279 Republican: 825,464
US Senate Total votes: 1,781,139 Democratic: 965,477 Republican: 787,182
US House: Total votes: 1,701,202 Democratic: 1,099,441 Republican 546,862
U.S House 8 districts, 8 Democrats 6 Republicans

Massachusetts
Registered voters: 3,990,505 total votes: 2,243,835 turnout:56.2%
Governor: Total votes: 2,219,779 Democratic: 1,234,984 Republican: 784,342
US Senate Total votes: 2,165,490 Democratic: 1,500,738 Republican: 661,532
US House: Total votes: 1,923,657 Democratic: 1,632,307 Republican: 198,550
U.S House candidates: 10 districts, 10 Democrats 3 Republicans

Michigan
Registered Voters: 7,255,972 Total Votes: 3,852,008  turnout: 53.1%
Governor: Total votes: 3,801,256 Democratic: 2,142,513 Republican: 1,608,086
US Senate Total votes: 3,780,142 Democratic: 2,151,278 Republican: 1,559,597
US House: Total votes: 3,648,502 Democratic: 1,923,485 Republican: 1,624,865
U.S House candidates: 15 districts, 15 Democrats 13 Republicans

Minnesota:
Registered voters: 3,118,398 Total votes: 2,217,818 turnout: 71.1%
Governor: Total votes: 2,202,937 Democratic: 1,007,460 Republican: 1,028,568
US Senate Total votes: Democratic: 1,278,849 Republican: 835,653
US House: Total votes: Democratic: 1,152,621 Republican: 924,636

Mississippi
US Senate Total votes: 610,921 Republican: 388,399 Democratic: 213,000
US House: Total votes: 600,697 Republican: 304,308 Democratic: 260,330
U.S House candidates: 3 Democrats 4 Republicans

Missouri
Registered voters: 4,007,174
US Senate Total votes: 2,128,459 Democratic: 1,055,255 Republican: 1,006,941
US House: Total votes: Total votes: 2,097,322 Democratic: 992,258 Republican: 1,049,346

Montana
Registered voters: 649,436  Total votes: 411,061 turnout: 63.3%
US Senate Total votes: 406,505 Democratic: 199,845 Republican: 196,283
US House: Total votes: 406,125 Democratic: 158,916 Republican: 239,124

Nebraska
Registered voters: 1,138,422 Total votes: 610,499 turnout: 53.6%
Governor: Total votes: 593,357 Republican: 435,507 Democratic: 145,115
US Senate Total votes: 592,316 Republican: 213,928 Democratic: 378,388
US House: Total votes: 596,087 Republican: 334,177 Democratic: 261,910

Nevada
Registered voters: 991,054 Total votes: 586,274 turnout: 59.2%
Governor: Total votes: 582,158 Republican: 279,003 Democratic: 255,684
US Senate Total votes: 582,572 Republican: 322,501 Democratic: 238,796
US House: Total votes: 574,827 Republican: 260,317 Democratic: 287,879

New Hampshire
Governor: Total votes: 403,372 Democratic: 298,761 Republican: 104,288
US House: Total votes: 402,354 Democratic: 209,434 Republican: 189,615

New Jersey
Registered voters: 4,848,956 Total votes: 2,315,643 turnout: 47.8%
US Senate Total votes: 2,250,070 Democratic: 1,200,843 Republican: 997,775
US House: Total votes: 2,136,842 Democratic: 1,207,784 Republican: 903,176
U.S House candidates: 13 districts, 13 Democrats 11 Republicans

New Mexico
Registered voters: 1,088,975
Governor: Total votes: 559,170 Democratic: 384,806 Republican: 174,364
US Senate Total votes: 558,550 Democratic: 394,365 Republican: 163,826
US House: Total votes: 561,084 Democratic: 313,124 Republican: 247,825

New York
Registered voters: 11,669,573 Total votes: 4,703,830 turnout: 40.3%
Governor: Total votes: 4,437,220 Democratic: 3,086,709 Republican: 1,274,335
US Senate Total votes: 4,490,053 Democratic: 3,008,428 Republican: 1,392,189
US House: Total votes: 4,140,378 Democratic: 2,794,262 Republican: 1,338,518
U.S House candidates: 29 districts, 29 Democrats 25 Republicans

North Carolina
Registered voters: 5,567,424
US House: Total votes: 1,940,808 Democratic: 1,026,915 Republican: 913,893
U.S House canidates: 13 districts, 13 Democrats 12 Republicans

North Dakota
Eligable voters: 495,411 (no voter registration)
US Senate Total votes: 218,152 Democratic: 150,146 Republican: 64,417
US House: Total votes: 217,621 Democratic: 142,924 Republican: 74,687

Ohio
Registered Voters: 7,860,052 Total votes: 4,184,072 turnout: 53.2%
Governor: Total votes: 4,022,754 Democratic: 2,435,384 Republican: 1,474,285
US Senate Total votes: 4,019,236 Democratic: 2,257,369 Republican: 1,761,037
US House: Total votes: 3,961,195 Democratic: 2,081,737 Republican: 1,870,390

Oklahoma
Registered voters: 2,075,561
Governor: Total votes: 926,462 Democratic: 616,135 Republican: 310,327
US House: Total votes: 905,194 Democratic: 372,888 Republican: 518,025

Oregon
Eligable voters: 2,696,681 Registered voters: 1,976,669 Total votes: 1,399,650 turnout: 70.8%
Governor: Total votes: 1,379,475 Democratic: 699,786 Republican: 589,748
US House: Total votes: 1,357,434 Democratic: 765,853 Republican: 557,491

Pennsylvania
Registered voters: 8,182,876
Governor: Total votes: 4,096,077 Democratic: 2,470,517 Republican: 1,622,135
US Senate Total votes: 4,081,043 Democratic: 2,392,984 Republican: 1,684,778
US House: Total votes: 4,013,388 Democratic: 2,229,091 Republican: 1,732,163
U.S House candidates: 19 districts, 19 Democrats 17 Republicans

Rhode Island  Eligable voters: 750,521
Governor: Total votes: 386,809 Democratic: 189,503 Republican: 197,306
US Senate Total votes: 384,993 Democratic: 206,043 Republican: 178,950
US House: Total votes: 373,148 Democratic: 264,949 Republican: 41,836
U.S House candidates: 2 districts, 2 Democrats 1 Republican

South Carolina
Registered voters: 2,473,992
Governor: Total votes: 1,091,952 Republican: 601,868 Democratic: 489,076
US House: Total votes: 1,086,206 Republican: 599,615 Democratic: 472,719

South Dakota
Registered voters: 554,038 Total votes: 341,105 Turnout: 61.6%
Governor: Total votes: 335,508 Republican: 206,990 Democratic: 121,226
US House: Total votes: 333,562 Republican: 097,864 Democratic: 230,468

Tennessee
Registered voters: 3,773,847
Governor: Total votes: 1,810,140 Democratic: 1,241,606 Republican: 538,508
(Governor results still unofficial :|)
US Senate Total votes: 1,833,695 Democratic: 879,976 Republican: 929,911
US House: Total votes: 1,715,426 Democratic: 860,861 Republican: 799,547
Harold Ford's brother, Jake Ford ran as an independent in CD9 and received 38,243 votes.  

Texas
Eligable voters: 16,636,742 Registered Voters: 13,074,279
Governor: Total votes: 4,399,068 Republican: 1,716,803 Democratic: 1,310,353
US Senate Total votes: 4,314,663 Republican: 2,661,789 Democratic: 1,555,202
US House: Total votes: 4,179,699 Republican: 2,183,833 Democratic: 1,852,611
U.S House candidates 32 districts, 31 Democrats 28 Republicans (including the write in Republican in Tom Delay's district)

Utah
Registered voters: 1,302,405 Total votes: 582,561 turnout 44.7%
US Senate Total votes: 571,252 Republican: 356,238 Democratic: 177,459
US House: Total votes: 569,690 Republican: 292,235 Democratic: 244,483

Vermont
Registered voters: 433,572 Total votes: 263,025 Turnout: 60.7%
Governor: Total votes: 262,524 Democratic: 108,090 Republican: 148,014
US Senate Total votes: 262,419 Independent 171,638 Republican: 84,924
US House: Total votes: 262,726 Democratic: 139,815 Republican: 117,023

Virginia
Registered voters: 4,554,683 Total votes: 2,398,589 Turnout: 52.7%
US Senate: Total votes: 2,370,445 Democratic: 1,175,606 Republican: 1,166,277
Most states make results available by county.  Virginia gives U.S Senate results by Congressional district.  If only other states did this!

CD 1
US House: Democratic: 081,083 Republican: 143,889
US Senate Democratic: 102,270 Republican: 125,827

CD 2
US House: Democratic: 83,901 Republican: 88,777
US Senate Democratic: 83,268 Republican: 89,145

CD 3
US House: Democratic: 133,546 Republican: -------
US Senate Democratic: 113,300 Republican: 51,209

CD 4
US House: Democratic: ------ Republican: 150,967
US Senate Democratic: 96,283 Republican: 116,712

CD 5
US House: Democratic: 84,682 Republican: 125,370
US Senate Democratic: 96,153 Republican: 114,572

CD 6
US House: Democratic: ------ Republican: 153,187
US Senate Democratic: 87,929 Republican: 126,940

CD 7
US House: Democratic: 088,206 Republican: 163,706
US Senate Democratic: 109,453 Republican: 147,411

CD 8
US House: Democratic: 144,700 Republican: 66,639
US Senate Democratic: 151,517 Republican: 65,792

CD 9
US House: Democratic: 129,705 Republican: 061,574
US Senate Democratic: 084,816 Republican: 105,747

CD 10
US House: Democratic: 098,769 Republican: 138,213
US Senate Democratic: 120,959 Republican: 118,132

CD 11
US House: Democratic: 102,511 Republican: 130,468
US Senate Democratic: 129,658 Republican: 104,790

Washington
Registered voters: 3,264,511
US Senate Total votes: 2,083,734 Democratic: 1,184,659 Republican: 832,106
US House: Total votes: 2,054,056 Democratic: 1,244,095 Republican: 798,005

West Virgnia
Registered voters: 1,137,371 Total votes: 473,014 turnout: 41.6%
US Senate Total votes: 459,884 Democratic: 296,276 Republican: 155,043
US House: Total votes: 454,813 Democratic: 263,822 Republican: 190,893

Wisconsin
Registered voters: 3,054,690 (as of August 31)
Governor: Total votes: 2,161,700 Democratic: 1,139,115 Republican: 979,427
US Senate Total votes: 2,138,297 Democratic: 1,439,214 Republican: 630,299
US House: Total votes: 2,063,413 Democratic: 1,003,156 Republican: 1,040,071
U.S House candidates: 8 districts, 7 Democrats 8 Republicans

Wyoming
Registered voters: 263,083 Total votes: 196,217 Turnout: 74.6%
Governor: Total votes: 193,616 Republican: 58,100  Democratic: 135,516
US Senate Total votes: 192,845 Republican: 135,174 Democratic: 57,671
US House: Total votes: 193,141 Republican: 93,336  Democratic: 92,324