President Donald Trump will oppose any congressional attempts to reinstate funding for Obamacare subsidies — unless he gets something in return, his budget director Mick Mulvaney said in an interview Friday morning.The comments by the Office of Management and Budget chief delivered a severe blow to efforts by Sens. Lamar Alexander (R-Tenn.) and Patty Murray (D-Wash.) to strike a bipartisan deal on funding the subsidies.