Photos: Moments from Marco Rubio's career Florida Sen. Marco Rubio speaks in October 2013 at the Values Voter Summit, held by the Family Research Council in Washington. Hide Caption 1 of 20

Photos: Moments from Marco Rubio's career Sen. Mike Lee, left, and Rubio talk before a news conference to introduce their proposal for an overhaul of the tax code in March. Hide Caption 2 of 20

Photos: Moments from Marco Rubio's career Rubio, center, arrives in the House chamber ahead of Israeli Prime Minister Benjamin Netanyahu's address to a joint meeting of the U.S. Congress in March. Hide Caption 3 of 20

Photos: Moments from Marco Rubio's career Rubio speaks with the media after delivering remarks during the graduation of small business owners from the Goldman Sachs 10,000 Small Businesses program held in Miami in February. Hide Caption 4 of 20

Photos: Moments from Marco Rubio's career Rubio talks to aides in December before speaking on President Barack Obama's announcement about revising policies on U.S.-Cuba relations. Hide Caption 5 of 20

Photos: Moments from Marco Rubio's career Rubio, left, talks to Sen. Lindsey Graham prior to a news conference on Capitol Hill in July. Hide Caption 6 of 20

Photos: Moments from Marco Rubio's career Rubio talks to reporters in June after a closed door briefing on Capitol Hill. Hide Caption 7 of 20

Photos: Moments from Marco Rubio's career Rubio speaks to the media in front of a wall dedicated to the victims of the violence in Venezuela as he shows support for the Venezuelan community at a restaurant in Doral, Florida, in April 2014. Hide Caption 8 of 20

Photos: Moments from Marco Rubio's career Rubio speaks to the media at the Doral restaurant in April 2014. Hide Caption 9 of 20

Photos: Moments from Marco Rubio's career Rubio checks his phone in March as he arrives for a Capitol Hill news conference to introduce a proposal for an overhaul of the tax code. Hide Caption 10 of 20

Photos: Moments from Marco Rubio's career Rubio, left, is greeted as he arrives at a restaurant in Doral in February 2014. Hide Caption 11 of 20

Photos: Moments from Marco Rubio's career Rubio, left, and Florida Gov. Rick Scott speak to the media in Doral in February 2014. Hide Caption 12 of 20

Photos: Moments from Marco Rubio's career From left, Sens. Cory Booker, Rubio, Kristen Gillibrand and John McCain wait for Obama to deliver the State of the Union address in January 2014. Hide Caption 13 of 20

Photos: Moments from Marco Rubio's career Rubio addresses an event held by the American Enterprise Institute for Public Policy Research in January 2014. Hide Caption 14 of 20

Photos: Moments from Marco Rubio's career Paralympian Brad Snyder poses with Rubio during a Team USA Congressional visit in November 2013. Hide Caption 15 of 20

Photos: Moments from Marco Rubio's career Rubio speaks in November 2013 during a campaign stop for Virginia Attorney General Ken Cuccinelli, the Republican candidate for governor of Virginia. Hide Caption 16 of 20

Photos: Moments from Marco Rubio's career Rubio confers with McCain as U.S. Ambassador to Syria Robert Ford testifies before the Senate Foreign Relations Committee in October 2013. Hide Caption 17 of 20

Photos: Moments from Marco Rubio's career Rubio, center, speaks to members of the media as Sen. Ron Johnson, left, and Rep. Ron DeSantis listen during a news conference on Capitol Hill in October 2013. Hide Caption 18 of 20

Photos: Moments from Marco Rubio's career Rubio returns to the Capitol after meeting with Obama and other Republican leaders about the government shutdown in October 2013. Hide Caption 19 of 20