Go here and read.
The reason is that pretty much every Republican advocated policy is stupid, even when they have good intentions. The latest is the whole "drill, drill, drill" meme that is being pushed as a real solution to gasoline prices.
I'll admit I'm a bit up in the air about the price of gas: Does the good that high prices do offset the hurt that it causes lower income families? I really don't know the answer, but I do know that the Republican solution will do no good to anyone but oil companies, yet people--in large numbers--are falling for it...again.