WASHINGTON (AP) — A $14 billion rescue package for America's imperiled auto industry sped to approval in the US House last night, but the emergency bailout was still in jeopardy from Republicans who were setting out roadblocks in the Senate.

Democrats and the Bush White House hoped for a Senate vote as early as today and enactment by week's end. They argued that the loans authorised by the measure were needed to stave off disaster for the auto industry — and a crushing further blow to the reeling national economy.

The legislation, approved 237-170 by the House, would provide money within days to cash-starved General Motors Corp. and Chrysler LLC. Ford Motor Co., which has said it has enough to stay afloat, would also be eligible for federal aid. Republicans were preparing a strong fight against the aid plan in the Senate, not only taking on the Democrats but standing in open revolt against their party's lame-duck president on the measure.

The Republicans want to force the companies into bankruptcy or mandate hefty concessions from autoworkers and creditors as a condition of any federal aid. They also oppose an environmental mandate that House Democrats insisted on including in the measure.

House Speaker Nancy Pelosi said it represented "tough love" for US auto companies, and "giving a chance — this one more chance — to this great industry".

The White House, struggling to sell the package to congressional Republicans, said earlier that a carmaker bankruptcy could be fatal to the auto industry and have a devastating impact on workers, families and the economy.

"We believe the legislation developed in recent days is an effective and responsible approach to deal with troubled automakers and ensure the necessary restructuring occurs," said Dana Perino, the White House press secretary. But the measure faces a difficult road in the Senate, where it needs 60 votes to advance. Rank-and-file Senate Republicans skewered the bill during a closed-door luncheon with White House Chief of Staff Josh Bolten, who was dispatched to Capitol Hill to make a case for the rescue package.

Besides providing cash for the auto companies, it would create a government "car czar," to be named by President George W. Bush to dole out the loans.