Donald Trump descends in a very powerful way from longstanding tenets of American conservatism, they're just not the movement conservatism we associate with Reagan.

Paul Ryan and his allies, who include Mike Pence, are congressional conservative Republicans, they have a very clear conservative agenda. The question will be who has to bend more to accommodate the other - Mr. Trump accommodate their ideology, or will they have to accommodate his? And if he can rally audiences behind him, we could see a very interesting intra-party war of a kind we haven't seen in a really long time.

Donald Trump enters office with historically low approval ratings, that's where the battle could get fought. If the country turns against him, his Republican adversaries could feel emboldened.

The Republican - conservative Republican answer has always been when we lose it's because we're not ideological enough. If they lose midterm elections, that's why. If Obama defeats McCain and then Mitt Romney, it's because those two Republican candidates were not ideological enough.

Donald Trump descends in a very powerful way from longstanding tenets of American conservatism, they're just not the movement conservatism we associate with Reagan.

Our nemesis is time, against which we have a single ally, memory, and even it betrays us.

Donald Trump very clearly said America first. That is a traditional right wing, but also very isolationist. That takes us back to the era of the 1920s, when there were immigration restrictions, and also to the isolationism before World War II.