Florida's Senate race candidatesRubio has been in the US Senate since 2011.
He rose quickly in politics at a young age, serving as speaker of the Florida House from 2006 to 2008 while he was still in his 30s.
After losing the White House race, Rubio decided to run for his Senate seat again — contradicting a previous pledge to leave Congress in 2017.
In comparison, Rubio has raised $44.2 million, spent $34.7 million, and has $9.6 million on hand, as of September 30.
What experts sayThe race between Rubio and Demings is rated as "likely Republican" by Inside Elections, "likely Republican" by The Cook Political Report, and "likely Republican" by Sabato's Crystal Ball at the University of Virginia Center for Politics.