Who's running and who could run in 2016?

Published On: Nov 08 2012 10:41:49 AM CST   Updated On: May 30 2015 11:05:49 AM CDT

Former Maryland Gov. Martin O'Malley announced his candidacy for president on May 30, 2015. Check out other formally announced or potential 2016 candidates.

Marco Rubio
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T.J. Kirkpatrick/Getty Images

Marco Rubio (Republican) -- The Florida senator says he is running for president and is "uniquely qualified" to talk about the future, according to CNN.

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