WASHINGTON — Congressional Democrats are pushing legislation to send $25 billion in emergency loans to the beleaguered auto industry in exchange for a government ownership stake in the Big Three car companies.

House Speaker Nancy Pelosi, D-Calif., and Senate Majority Leader Harry Reid, D-Nev., hope for quick passage of the auto bailout during a postelection session that begins Monday.

Legislation being drafted by Rep. Barney Frank, chairman of the House Financial Services Committee, and Sen. Carl M. Levin, D-Mich., would dip into the $700 billion Wall Street rescue money, approved by Congress last month, for the auto aid.

President Bush is cool to that idea. But the White House says he is open to helping the automobile industry, which is buckling under poor sales, tight credit and a sputtering economy.

Any effort to throw the companies a lifeline could run into GOP roadblocks that could derail it in the Senate. In that chamber, Republicans, including some who believe their votes for the Wall Street bailout hurt, and in some cases doomed, their re-election bids, are loath to agree to any new money.

Sen. Mitch McConnell, R-Ky., the minority leader, was noncommittal about additional aid. In a statement, his spokesman said Congress should move to speed the release of a $25 billion loan program passed earlier to help the carmakers develop fuel-efficient vehicles.

Treasury Secretary Henry Paulson said yesterday the auto sector was "critical," but that the financial industry rescue was not designed for automobile manufacturers.