WASHINGTON (AP) - His last vacation behind him, President Barack Obama is entering the closing stretch of his presidency, an eleventh-hour push to tie up loose ends and put finishing touches on his legacy before handing the reins to President-elect Donald Trump. Obama returned to Washington midday Monday from Hawaii with less than three weeks left. His final days will largely be consumed by a bid to protect his endangered health care law, a major farewell speech and the ongoing handover of power to Trump.