Sen. Joe Lieberman kept a key committee gavel but won the rebuke of his colleagues for campaigning against Sen. Barack Obama in a deal brokered Tuesday morning by Colorado Sen. Ken Salazar and a handful of other Democratic senators. "It's time to unite our country," Salazar said after Senate Democrats voted 42-13 to allow the Connecticut independent, who caucuses with the Democrats, to continue as Homeland Security and Governmental Affairs Committee chairman.