Rubio has lots of time (Noon, May 2 - Noon, May 6, 2016) to still file for reelection to the Senate while he plays the Presidential field. I will do everything in my power to stop him on both.
http://dos.myflorida.com/elections/candidates-committees/qualifying/
We have a Congressman for the 6th District of Florida who has already announced his intention to run for that seat, Ron DeSantis. Although I disagree strongly on his vote to keep Bonehead as speaker, he had an excellent rating from the Conservative Review of 91% but has slipped to 87% after voting for TPP.
https://www.conservativereview.com/members/scorecard/R/412526
Rubio will be out by March 31