John McCain returned to Washington to cast deciding vote
                                
                                
                                    (Newser) -
                                    Just a week after their efforts appeared dead, Senate Republicans have taken a successful step toward repealing the Affordable Care Act,  Politico  reports. According to  Mediate , a motion to proceed on the healthcare debate passed the Senate 51-50 on Tuesday with Vice President Pence casting the tie-breaking vote. Sen. John...