There is something about Bill Clinton and tarmacs. The tarmac appears to be one of Bill Clinton's political blind spots. In 1992 he decided to have a haircut on a tarmac.
This year he kept Barack Obama waiting. And it perhaps is a non event between the two of them. I am sure they are the best of friends. And Obama has made comedy hay out of it too.
But I can't think of a better way to depress millennial support for Hillary Clinton. It was a public incident involving two of the most visible men.