Angela [Merkel] and I also agreed the need for a comprehensive and humane response to the devastating humanitarian crisis in Syria and for the influx of migrants and refugees from around the world. We need to build on the progress achieved at the U.N. Refugee Summit, which yielded new commitments from some 50 nations and organizations.

The problem with all these tired excuses for inaction is that it suggests a fundamental lack of faith in American business and American ingenuity.

I actually think, when you're young, ambitions are somewhat common - you want to prove yourself. It may grow out of different life experiences. You may want to prove that you are worthy of the admiration of the demanding father. You may want to prove that you are worthy of the love of an absent father.

The more we are using clean energy, renewable energy sources, the less environmentally problematic facilities end up being a problem for everybody, but particularly for folks who have to suffer the consequences of some of these facilities.

You now have the potential of 200 people deciding who ends up being elected president every single time.

One of the things I advised Donald Trump to do was to make sure that, before he commits to certain courses of action, he has really dug in and thought through how various issues play themselves out.

The Middle East is obviously an issue that has plagued the region for centuries.