U.S., NATO officials expect approval for Afghan troop deal --- (Reuters) - Senior U.S. and NATO officials said on Tuesday they were confident Afghanistan's elders and parliament would back a deal allowing American troops to stay there after 2014, playing down lingering concerns over the accord. --- The Afghan president's spokesman Aimal Faizi had told Reuters on Sunday Kabul and Washington had not yet agreed on several issues in a bilateral security pact, raising the prospect that the U.S. might still have to pull all its troops from the war-ravaged nation by the deadline.