The U.S. government hurtled toward a Wednesday shutdown as Democrats blocked a Republican stopgap funding package that didn’t address their demands, the latest sign that neither party was likely to fold in the final hours before a federal funding deadline. With no more votes planned in the Senate before a midnight deadline, the White House’s Office of Management and Budget instructed government agencies to "execute their plans for an orderly shutdown.”Congressional Democrats and President Donald Trump dug in Tuesday on a confrontation over health care spending, fueling an imminent shutdown risk that appears certain to disrupt national services, furlough federal workers and interrupt the flow of critical data on a murky economy.