because it's not a tv-friendly sports format (few opportunities for commercial breaks).
Also, other, more established professional sports already dominate American television year-round. Over time seasons have been extended so that for much of the year, two out of our three big professional leagues (NFL, NBA, MLB) are going on, not to mention college football and basketball.
My biggest gripe about futbol is the clock never stopping. It creates too many opportunities for gamesmanship; players on the team that's ahead are very, very slow to get up off the ground, slow to throw the ball back on the field, and so on. I don't like the stall tactics. Stop the clock if the ball isn't in play.
A bunch of Republicans thinking about running for president have done that for similar reasons--we have no contribution limits for our PACs. In fact, Minnesota Governor Tim Pawlenty has already formed an Iowa PAC.
Yeah, that is ridiculous. Why shouldn't organized labor try to hold someone like Lincoln accountable? She lied to them about supporting EFCA and other things (like a public health insurance option), when in reality she only supported them when they had no chance of becoming law.