There are reasons that conservatives like Joseph Farah are turning against Bush. The Washington Times reports that Republican lawmakers are enraged at Bush over spending & immigration. Bush responded:

Mr. Duffy said the president delivered a passionate defense of his immigration plan, telling the Republican caucus that his policy is not a political ploy.
"He said he didn't do it for politics [but] because that's what he believes is good for the country," Mr. Duffy said, adding that Mr. Bush drove his point home by saying, "I'm from Texas and I know this issue."

Look, I know Bush is a politician. He's not going to satisfy everyone. He'll withdraw from the national ATM more than the libertarians want him to. He'll allow more babies/fetuses to be sliced & vacuumed than the pro-lifers would like. He'll do less world conquering than the neocons want him to. He'll stand up for the rights of the "root stock" (*wink*) far less than the paleocons want. That's politics-dirty rotten compromise. But above, Bush is telling you where he'll make a principled, anti-political stand. It's all rather bizarre to me-and I don't have any pigeon-hole to place GW in at this point. The citizens of Mexico are decent human beings who deserve a decent government and responsive politicians. I would just rather not have GW Bush step in and play that role for them.