Barack Obama: “We can't afford to do both.”

People need to “rediscover what’s the story we tell about how we’re going to live together, and see each other, and recognise each other, and disagree, and yet, still care for each other”.

Because if this becomes the new normal, there’s no reason to believe it will stop with her — or that future presidents, in either party, won’t do the same.

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

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