I don't think we need to have an either/or debate about the use of military force - I think you can be both tough and smart.

Everybody in the government with whom I emailed knew that I was using a personal email, and I have said it would have been a better choice to have had two separate email accounts. And I've also tried to not only take responsibility, because it was my decision, but to be as transparent as possible.

I`m running for president because everyday Americans and their families need a champion, and I want to be that champion. I want to make the words middle class mean something again.

I made policy decisions based on what I thought was right that keep Americans safe and to protect U.S. interests abroad. No wild political attacks by Donald Trump is going to change that.

The most important thing I have to say to you today is that hair matters. Pay attention to your hair, because everyone else will.

He [ Vladimir Putin] would rather have a puppet as president of the United States.

A nuclear-weapons armed Iran is not in anyone's human-rights interests. That is a direct threat to the lives and the livelihoods and the stability not only of the region but beyond.