Donald Trump endorses House Speaker Paul Ryan

Donald Trump has formally endorsed House Speaker Paul Ryan, after saying he wasn't ready to do so earlier this week.

Trump made the announcement during a campaign stop Friday in Green Bay, Wisconsin.

He says, "I support and endorse our Speaker of the House Paul Ryan," adding that while they "may disagree on a couple of things," they agree on a lot as well.

The timing is unusual. The rally is being held on a Friday night opposite the opening ceremonies of the Olympics.

In an interview earlier this week, Trump said he was "not quite there yet" when it came to endorsing Ryan in his primary race. He also praised Ryan's opponent, Paul Nehlen, for running "a very good campaign."

Nehlen says Trump's decision "is appropriate and is a display of true leadership."