Candidates Look to Ohio on Super Tuesday Listen Download Embed Share Share this on Facebook (Opens in a new window) Share this on Twitter (Opens in a new window) Share this via Email Republican presidential candidates Ron Paul (L), Rick Santorum (2nd L), Mitt Romney (2nd R) and Newt Gingrich during their debate on February 22, 2012 in Mesa, Arizona. ( DON EMMERT / Getty ) Produced by PRI and WNYC