Barack Obama: “The defining issue of our time is how to keep that promise alive.”

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

The effort, he said, “should outrage all Americans, regardless of how they feel about Congresswoman Omar’s political views.”

The full weight of the federal government is being brought down on a law-abiding elected official because she has dared to criticize the president.

It is a basic principle of American democracy that the government can’t selectively target individuals simply because of their political beliefs or what they say.