Barack Obama: “I face the world as it is, and cannot stand idle in the face of threats to the American people.”

A drift towards extremism was "not inevitable

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”.

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.

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.