Hillary Clinton throws down the gauntlet, seeming to threaten to stay in the race until the convention by stating during her May 20th Kentucky speech:

"And I'm going on now to campaign in Montana, South Dakota, and Puerto Rico.

And I'm going to keep standing up for the voters of Florida and Michigan.

Democrats in those two states cast 2.3 million votes, and they deserve to have those votes counted.

And that's why I'm going to keep making our case until we have a nominee, whoever she may be."