Senate Republicans have blocked a Democratic effort to repeal the military’s ban on openly gay servicemembers known as “Don’t Ask, Don’t Tell.” On Tuesday, Democrats fell four votes shy of the sixty needed to advance a defense authorization bill that includes the ban’s repeal. Democratic Senators Blanche Lincoln and Mark Pryor of Arkansas sided with Republicans in the 56-to-43 vote. The outcome also stalls a separate provision that would allow undocumented young people a chance at citizenship, called the DREAM Act. Senate Democrats say they expect another vote before the end of the year.