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.

It will be an unusual dynamic [in Congress]. It won't be like the rallying behind President [Barack] Obama in 2009 or behind President [George W.] Bush, even at the beginning of his presidency, or even [Bill] Clinton in '93, when he got his budget through on a partisan vote.

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.

Republicans can also point to an alternate path. They can draw upon genuine experts to explain what should be done.

If President [Barack] Obama - President [Donald] Trump shows up with a, you know, cleaver and just says, I can get rid of all these regulations, I can get rid of ObamaCare, no problem at all, then that would be a mistake.

Many of Bush's defenders have praised him for keeping the country safe since Sept. 11, 2001. He deserves that praise, and I'm perfectly happy to defend most of his surveillance, interrogation and counterterrorism policies against his critics.

In any case, open-seat presidential elections like 2008 just are different in character from incumbent reelects, and I think that's the most important thing about this election - is that once there's an incumbent running for reelection, most of the debate is about, "Has he [Barack Obama] done a good job?" Most of the judgment is, "Do you want to keep him or do you want to replace him?" Now, the opponent has to also be acceptable and has to make his own case.