If you look at the polls - the conservatives are fine.I think there will be a fair amount of enthusiasm, or at least motivation. They very much want to remove President [Barack] Obama.

At the end of the day,[Mitt] Romney was pro-life, but [Rick] Santorum was more fervently pro-life, and had been for longer. They're all going to repeal Obamacare, but Romney has once endorsed something like it. In the old days, there really were differences on fundamental issues, even on foreign policy, [for which] [Newt] Gingrich, Romney, and Santorum were pretty similar.

I think the whole dynamic is different. Whereas in [Barack] Obama's case, even though there was no incumbent, he was able to run against eight years of Bush-Cheney and a Republican Congress, and everyone was tired of everything. He was able to benefit from that.

American power should be used not just in the defense of American interests but for the promotion of American principles.

The average GOP presidential vote in these last five elections was 44.5 percent. In the last three, it was 48.1 percent. Give Romney an extra point for voter disillusionment with Obama, and a half-point for being better financed than his predecessors. It still strikes me as a path to narrow defeat.

It's been an unusual election [2016].

Mitt Romney has to convince the American public that they need to do something they're not usually inclined to do - replace a sitting president with a challenger. And unlike in 1980 and 1992, when the public was persuaded to do just that, the incumbent president has not been weakened by a primary opponent.