Barack Obama: “With the challenges we face right now, it is absolutely critical that you stay involved and make your voices heard.”

A drift towards extremism was "not inevitable

The fact that any president, or any administration, is willing to engage in such transparent efforts to intimidate someone should outrage all Americans, regardless of how they feel about Congresswoman Omar’s political views.

And I will fight for that, even if I don’t always think it’s going to win.

I think when we act on that basis, it doesn't always work out, but over time things do get better.