Barack Obama: “This is obviously a cause for concern and requires a heightened state of alert. But it's not a cause for alarm.”

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

When we choose, when we make that decision, I do believe – and there is evidence for this – that the world gets incrementally better, and that is a worthy goal and it’s worth fighting for.

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.

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.