WASHINGTON — The day began with an agreement that Washington hoped would end the financial crisis that has gripped the nation. It dissolved into a verbal brawl in the Cabinet Room of the White House, urgent warnings from the president and pleas from a Treasury secretary who knelt before the House speaker and appealed for her support.

After several hours of discussions with President George W Bush, a group of Republican members of Congress blocked the government plan.
The proposal would have seen the government buy bad debts from US banks. Without a swift rescue package more finance companies are expected to collapse, causing more serious damage to the global economy.

Financial markets are gummed up because banks do not know exactly how much bad debt they hold and are therefore reluctant to lend to businesses, consumers and each other.

It was an implosion that spilled out from behind closed doors into public view in a way rarely seen in Washington.

By 10:30 p.m., after another round of talks, Congressional negotiators gave up for the night and said they would try again on Friday. Left uncertain was the fate of the bailout, which the White House says is urgently needed to fix broken financial and credit markets, as well as whether the first presidential debate would go forward as planned Friday night in Mississippi.

When Congressional leaders and Senators John McCain and Barack Obama, the two major party presidential candidates, trooped to the White House on Thursday afternoon, most signs pointed toward a bipartisan agreement on a grand compromise that could be accepted by all sides and signed into law by the weekend. It was intended to pump billions of dollars into the financial system, restoring liquidity and keeping credit flowing to businesses and consumers.

“We’re in a serious economic crisis,” Mr. Bush told reporters as the meeting began shortly before 4 p.m. in the Cabinet Room, adding, “My hope is we can reach an agreement very shortly.”

But once the doors closed, the smooth-talking House Republican leader, John A. Boehner of Ohio, surprised many in the room by declaring that his caucus could not support the plan to allow the government to buy distressed mortgage assets from ailing financial companies.