Not speaking about any of the current candidates in particular, but just about the party platform in general.
There is a dawning realization among "intellectual conservatives" (esp. several prominent newspaper columnists) as well as among those who classify themselves as independent, that the "Republican Party" in office in recent years actually holds to very few of the "traditional" Republican party planks.
In particular:

• Small Government
• Reduced Spending
• States Rights
• Isolationist Foreign Policy
• Personal Privacy

These have been traditional positions of the Republican party, but you can see that the huge budget, giant growth in government agencies, nationalization of the banks, refusal to let California go its own way on some environmental issues, two wars overseas initiated by the U.S., and the rampant loss of personal privacy all go against the traditional stated goals of the Republican Party.

You might argue that the only truly consistent "Republican action" taken by the Bush administration in the past 8 years was cutting taxes.

"Republican" and "Democrat" are really just marketing brands at this point, and are basically a continuously varying hodge-podge collection of positions on various hot-button issues in order to try to garner 51% of the electorate at any given time.

Regardless of the results of this election, there will be a major internal re-evaluation by the party and some serious navel-gazing of exactly what "Republican" means after this election of a far larger magnitude than even that of what the Democrats did in 1994 after the Gingrich-led "conservative backlash."