We know that Donald Trump has shown a very troubling willingness to back up [Vladimir] Putin, to support Putin, whether it's saying that NATO wouldn't come to the rescue of allies if they were invaded, talking about removing sanctions from Russian officials after they were imposed by the United States and Europe together, because of Russia's aggressiveness in Crimea and Ukraine, his praise for Putin which is I think quite remarkable.

I think it's only fair that Americans take into account who can keep them safe. Who has the best ideas for defeating ISIS. And protecting us here at home. I think I have laid out what I believe would work.

You just have to sort of figure out how to - getting back to that word, "balance" - how to balance the public and the private efforts that are necessary to be successful, politically, and that's not just a comment about today. That, I think, has probably been true for all of our history.

The Congress is not willing to think about the long term. They act like activist shareholders, to use that phrase again. They're not thinking about what can we do that will make us richer, safer, and stronger next year, and the year after, and five and 10 years out.

All of our presidents come into office looking so vigorous ... They grow grayer and grayer, and by the time they leave, they’re as white as the building they live in ... I have one big advantage: I’ve been coloring my hair for years. So you’re not going to see me turn white in the White House.

For more than a half a century, we know that we prospered because of a bipartisan consensus on defense and foreign policy. We must do more than return to that sensible, cooperative approach.

I don't want to rip away the security that people finally have; 18 million people now have healthcare; preexisting conditions are no longer a bar.