Who's running and who could run in 2016?

Published On: Nov 08 2012 10:41:49 AM CST   Updated On: May 27 2015 10:34:44 AM CDT

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

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Retired physician Ben Carson announced his candidacy for president of the United States on May 4.

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