Candidates seem certain to pay for aisle-crossing tickets
                                
                                
                                    (Newser) -
                                    With talk that John McCain and Barack Obama could pick Joe Lieberman and Chuck Hagel, respectively, to round out their tickets, liberal and conservative stalwarts tell Politico the aisle-crossing VPs would likely wreak havoc with the parties’ bases. While each has broken with his party on Iraq, Lieberman is far...