New York Times: The A.F.L.-C.I.O., the nations largest federation of unions, has issued an apparent endorsement of the Keystone XL oil pipeline apparent because it enthusiastically called for expanding the nations pipeline system, without specifically mentioning Keystone. And while some union leaders said the federations stance stopped short of an official endorsement, the nations building trades unions eager for the thousands of jobs the pipeline would create issued a statement saying the A.F.L.-C.I.O.s...