The possibility of collusion between Trump's allies and Russian intelligence is much more serious than Watergate. It is a constitutional crisis. It represents a violation of our republic's most sacred trust.

Women hold themselves back because they don't think their perspective matters. I'm here to tell you that you're not just robbing yourself when you do that: you're robbing all of us.

When I worked in the Obama White House, people in national security positions had been uneasy making broad public arguments, particularly about political matters.

Many have observed that Elizabeth Edwards could be a political figure in her own right. She has never had an interest in that.

It's a zero sum game: the Court either expands individual rights or expands the government's right to regulate individuals.

Well private money can take risks in a way that government money often isn't willing to.

A tournament pays me to show up because the fans want to see me and I move the needle at the box office? That's amazing. It's good for tennis, good for me and good for the event. If a sponsor wants to pay to put their company name on my shirt because they think I'm a strong ambassador for their brand? Heck yes.

I cannot imagine a worse job than being president of these Untied States in these most trying of times. President Barack Obama has been under siege from every side for the entirety of his time in office.