Mayor Bill de Blasio fueled speculation Thursday that a 2020 White House run could be in his future.

The mayor said he has not ruled out a run and that he's got a message to share, while speaking at a forum at Harvard University.

"I have a desire to go out and talk about real specific changes that we're making in New York City, that are an indicator where we all need to go. And I don't mean that with hubris, because every city is experimenting and trying to get it right," says de Blasio.