Check out the Tampa Tribune for why they aren't endorsing Bush when they did last time. Its a great read.
"we find it unimaginable to not be lending our voice to the chorus of conservative-leaning newspapers endorsing the president's re- election. We had fully expected to stand with Bush, whom we endorsed in 2000 because his politics generally reflected ours: a strong military, fiscal conservatism, personal responsibility and small government. We knew him to be a popular governor of Texas who fought for lower taxes, less government and a pro-business constitution.

But we are unable to endorse President Bush for re- election because of his mishandling of the war in Iraq, his record deficit spending, his assault on open government and his failed promise to be a ``uniter not a divider'' within the United States and the world."

For more on newspapers changing endorsement of Bush and jumping ship. Check out this great analysis of newspaper endorsements this election.