[ Bernie Sanders' popularity] is exactly the same as Donald Trump's.It is a bunch of people who are disaffected with what the establishment has done, and they are striking out. Do they have any clear idea of what they want as an alternative? No. The candidates that they have surrounded themselves with either have no idea or are promising things that are so impractical they will never get done.

By speeding the transition to cleaner energy, we can improve the lives of billions of people, while also reducing the risks we face from a changing climate.

When I came into office, people said, 'Billionaire? How do they live? What do they eat? How do they sleep?' Today, they see me on the subway coming uptown. A couple of people say hi, some people smile and nod. Some people just sleep. It's not an issue.

We would betray our values and play into our enemies' hands if we were to treat Muslims differently than anyone else. In fact, to cave to popular sentiment would be to hand a victory to the terrorists, and we should not stand for that.

Our climate is changing. And while the increase in extreme weather we have experienced in New York City and around the world may or may not be the result of it, the risk that it may be - given the devastation it is wreaking - should be enough to compel all elected leaders to take immediate action.

What chance does a five-foot-seven billionaire Jew who's divorced really have of becoming president?

We will rebuild, renew and remain the capital of the free world.