Chuck Hagel: “The reason that they didn't is because they were involved in negotiations with the Russians in the U.N.”

This is so unpredictable. And we've never seen anything quite like this in our lifetime, so there is no playbook here.

When the National Guard opened up on students and killed students, partly because they weren't trained, they panicked.

No one person should ever govern a party. That’s not the point of political parties. Political parties must be diverse, have different opinions.

The facts speak for themselves, and especially when you look at the many of the witnesses, who are Trump cabinet members, White House officials in the Trump administration, supporters of Mr. Trump.