He flopped in Iowa, but the former US vice-president insists he will prevail and capture the Democratic nomination and oust Donald Trump from the White House, writes Mark Leibovich.

It was a humid Sunday in June, a quiet afternoon that Pete Buttigieg knew would not remain quiet.

If you pitch up here with any regularity the name Mark Leibovich will be familiar to you.

Mark Leibovich takes stock of how Washington has — and hasn’t — changed in the time of Trump