With today's win in Puerto Rico, the recent alleged front-runner has now won a caucus and a primary!
UPDATE/RETRACTION (6/8/16): D'oh! The PR Republican primary was on March 6, 2016. The Raw Story article I linked to at the beginning of this post was dated Saturday June 5 (the day that PR held the Democratic Party's primary) and reported the Rubio win as if it just happened. But if you click through the link in the post to get the full results, it gets you to a CNN page dated March 6. So apparently Rubio won this while he was still running for President like a normal person.