Well, it's how you play the game. Pull on the heartstrings whenever you can. Also, I don't understand how Obama is "extreme liberal"
It's what everyone does, pin the stuff going wrong on the last party in charge.
They did it with (notably and fairly recently) LBJ, Nixon, Jimmy Carter, Reagan, etc. Obviously everyone campaigning in 2008 had to at least distance themselves from Bush's policies and economic strategies by saying 'I'm not Bush and he sucks! Vote for me I'll do things differently!*"
Now everyone's saying everything is stuff and the world is forgeted unless we take the reigns of evil socialist America and turn it back into the wholesome Christian moral-righteousness that America used to be (probably before the Civil War seeing how far back we have to go to even see some semblance of that "way" of thinking). Oh and this time around, you can't say you like Obama or else you'll be dead in the water come November.
Not to mention Rick Perry isn't well liked in Texas anyhow, and this isn't the first time America has seen a Texan president. Might've worked if Rick Perry was the first one trying to gain presidency, but not this time.