The White House is urging Congress to trim several billion dollars from the federal budget in the wake of pricey hurricane disaster relief — a move that could reignite a contentious debate over whether to offset the costs of the aid.In a Friday letter to House Appropriations Chairman Rodney Frelinghuysen (R-N.J.), White House Office of Management and Budget Director Mick Mulvaney identified $5.6 billion in cuts that “are prudent as the discussion around emergency funding of all types continue.”Mulvaney emphasized that the reductions “are not intended to offset” any recently-passed emergency funding for Texas, Florida and Puerto Rico — a sensitive topic for Capitol Hill.