Rasmussen Reports has the details:

Public opinion of the Attorney General is declining. The current survey, completed Tuesday night March 20, finds that just 26% have a favorable opinion of Gonzales. That's down six points from a survey conducted five days earlier. At the same time, the number with an unfavorable opinion of Gonzales has climbed to 52%. Last week, 49% had an unfavorable view, a figure that had already jumped up from 41% a month ago.

The number with a Very Unfavorable opinion of Gonzales is up to 28%. That's a 3-point increase over the past week and a ten-point increase over the past month. Just 8% have a Very Favorable opinion, down from 11% last week.

[...]

Fifty-seven percent (57%) of Americans say they are following the stories surrounding Gonzales Somewhat or Very Closely.

Twenty-seven percent (27%) say they are Very Concerned about the recent firing of 8 U.S. attorneys. Another 28% say they are Somewhat Concerned.

There is a school of thought among some Republicans inside the Beltway that President Bush should give up on any attempt to win back the support of a significant portion of Americans by tacking to the middle and should instead stick with his base of 30 to 35 percent. Disregarding the fact that this theory in some ways presupposes that the President ever cared about the concerns of those outside of his political base, which I would not be willing to concede, this reasoning is quite flawed. True, the situation for President Bush and the Republican Party could be worse than it is today; should the President's approval rating fall into the 20s or even teens for an extended period of time as a result of defections from Republicans, it would be near impossible for the GOP to reestablish itself within the electorate by the time voters go to the polls to decide the next president. That said, by continuing to stick with positions that are wildly and widely unpopular among Americans -- perhaps including keeping Gonzales on as Attorney General -- President Bush runs the risk of scarring his party in a much more long-term fashion, not only diminishing the GOP's chances in 2008 but in future elections as well. To put it another way, as long as the main cleavage within the electorate is over George W. Bush, the Democrats win. So if the Republican Party permanently becomes the party of George W. Bush as, say, it did in the 1930s and 1940s when it was viewed as the party of Herbert Hoover, it could be a very long time before it is seen as a viable choice by voters.