Who's running and who could run in 2016?

Published On: Nov 08 2012 10:41:49 AM CST   Updated On: May 28 2015 07:45:30 AM CDT

Former New York Governor George Pataki announced his candidacy for the 2016 presidential election on Thursday. Check out other formally announced or potential 2016 candidates.

Rick Santorum
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Photo by Alex Wong/Getty Images

Rick Santorum, the former Pennsylvania senator who mounted an unexpectedly strong bid for the Republican nomination in 2012, is making another bid for the White House. Santorum formally launched his campaign May 27 in Pennsylvania.

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