New Jersey Gov. Chris Christie is no longer just a popular governor; he has become a national Republican star. His focus on fiscal issues and his reluctance to wade into the culture wars—during his gubernatorial campaign, he declined Sarah Palin’s offer to stump for him—have endeared him to members of the GOP’s sane wing. “The breakthrough he’s scoring in New Jersey is hugely promising,” says David Frum, a conservative writer who fears that the Republican Party is being swallowed by the tea party.