FILE - In this Aug. 4, 2010, file photo President Barack Obama is introduced by AFL-CIO President Richard Trumka before he spoke about jobs and the economy at the AFL-CIO Executive Council in Washington. AFL-CIO leaders hope to smooth tensions at their executive council's annual winter meeting that starts Monday, March 12, 2012, in Orlando, Fla. Unions may be united in working to re-elect Obama, but their leaders also are trying to repair bitter divisions over his rejection of an oil pipeline from Canada to Texas. (AP Photo/Charles Dharapak, File)