The White House seems to be retreating from President Barack Obama’s campaign promise that he would not raise taxes on families making less than $250,000. Under persistent questioning from ABC’s George Stephanopoulos Sunday, Obama senior adviser David Axelrod declined to restate the vow and left open the possibility that the president might sign health care reform legislation that taxes high-cost, employer-provided insurance plans which some middle-class families currently receive tax free. “The president had said in the past that he doesn't believe taxing health care benefits at any level is necessarily the best way to go here. He still believes...