It’s much, much bigger than Bush, or Bush’s policies. Krugman nails it:

The fault, however, lies not in Republicans’ stars but in themselves. Forty years ago the G.O.P. decided, in effect, to make itself the party of racial backlash. And everything that has happened in recent years, from the choice of Mr. Bush as the party’s champion, to the Bush administration’s pervasive incompetence, to the party’s shrinking base, is a consequence of that decision.

If the Bush administration became a byword for policy bungles, for government by the unqualified, well, it was just following the advice of leading conservative think tanks: after the 2000 election the Heritage Foundation specifically urged the new team to “make appointments based on loyalty first and expertise second.”

Contempt for expertise, in turn, rested on contempt for government in general. “Government is not the solution to our problem,” declared Ronald Reagan. “Government is the problem.” So why worry about governing well?

Where did this hostility to government come from? In 1981 Lee Atwater, the famed Republican political consultant, explained the evolution of the G.O.P.’s “Southern strategy,” which originally focused on opposition to the Voting Rights Act but eventually took a more coded form: “You’re getting so abstract now you’re talking about cutting taxes, and all these things you’re talking about are totally economic things and a byproduct of them is blacks get hurt worse than whites.” In other words, government is the problem because it takes your money and gives it to Those People.

He concludes:

Will the Republicans eventually stage a comeback? Yes, of course. But barring some huge missteps by Mr. Obama, that will not happen until they stop whining and look at what really went wrong. And when they do, they will discover that they need to get in touch with the real “real America,” a country that is more diverse, more tolerant, and more demanding of effective government than is dreamt of in their political philosophy.