Who's running and who could run in 2016?

POSTED: 11:41 AM Nov 08 2012   UPDATED: 11:34 AM May 27 2015

Rick Santorum announced his candidacy for the 2016 presidential election on Wednesday. Check out other formally announced or potential 2016 candidates.

Mike Huckabee, April 2014
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Darren McCollester/Getty Images

Former Arkansas Gov. Mike Huckabee has been actively preparing for a presidential bid, traveling to early primary states and fleshing out his political team.

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