Of course we [with Angela Merkel] discussed our commitment to meeting shared security challenges from countering cyber threats to ensuring that Iran continues to live up to the terms of the Iran nuclear deal.

I say that is because those are the times where sometimes you feel actually a little bit hurt. Because you feel like saying to these folks, "[Don't] you think if I could do it, I [would] have just done it. Do you think that the only problem is that I don't care enough about the plight of poor people, or gay people, or immigrants, or ...?"

People'd be like, "Oh, spending taxpayer money." It's like, "No, no, I actually I'm paying for all of this. The only thing I don't pay for is Secret Service and an airplane."

I make no apologies for us wanting to do this [bombing Iraq and Syria] appropriately and in a way that is consistent with American values.

And let me say this as a politician I can promise you this, political leaders will never take risks if the people do not push them to take some risks. You must create the change that you want to see.

The truth is that, in trying to get at terrorists who are in countries that either are unwilling or unable to capture those terrorists or disable them themselves, there are a lot of situations where the use of a drone is going to result in much fewer civilian casualties and much less collateral damage than if I send in a battalion of marines.

If everything seems to be the same and no distinctions are made, then we won't know what to protect. We won't know what to fight for.