Russians don't want to fight ISIS in Syria. They want to leave that to us. Aside from that, I don't know what are the objectives that Mr. Trump seeks in having a good relationship with Mr. Putin.

Take cyber-capabilities. We have way more cyber-capability than Russia do. We could intervene in their elections easily. We choose not to do so because we're a different country. That's what Obama was trying to say.

I think something that's really understudied and misunderstood is the use of information.

Vladimir Putin will be up for reelection, and he has shifted his whole political strategy inside of Russia from one where he promised the Russians pretty much a chicken in every pot, a better economic way of life.

We can deal with Russia on counterterrorism. We have and I think we are right now. That's easy.

In retrospect, all revolutions seem inevitable. Beforehand, all revolutions seem impossible.

Russians don't want to fight ISIS in Syria. They want to leave that to us. Aside from that, I don't know what are the objectives that Mr. Trump seeks in having a good relationship with Mr. Putin.