Famed conservative radio and television commentator Geraldo Rivera is exploring a run for U.S. Senate in Ohio as a Republican, telling cleveland.com/The Plain Dealer that he thought he could run a campaign outside the normal bounds of politics. Rivera, 77, has been a staple on television and radio since the 1970s as both a correspondent and conservative political pundit. Rivera, who lives in Shaker Heights, tweeted Wednesday afternoon he was mulling running for Republican Sen. Rob Portman’s seat after Portman announced he would not seek re-election. In an interview with cleveland.com/The Plain Dealer, Rivera said he was serious about the...