Aides to Senator McCain, the Republican presidential nominee, said it was too soon to say whether he would oppose the plan being hashed out by the Bush administration and Congress, noting that the final details had yet to be presented. But Mr. McCain repeated his calls to add several provisions that the administration has opposed, including a guarantee that taxpayer money would not be used to enrich the executives of failing companies.

The Republican presidential candidate says he will work with the Rudd Government to establish a global framework that would encourage China and India to become part of the solution to man-made climate change. Senator McCain says he is committed to a market-based cap-and-trade system aimed at reducing carbon emissions. And he wants a closer bilateral partnership on other key issues such as nuclear proliferation, trade liberalisation and combating terrorism.

Senator Barack Obama significantly outspent Senator John McCain in August as the two campaigns ramped up their general election fight, with the Obama campaign spending $53 million that month, $32 million of which went to advertising. That compared with the $41 million spent by the McCain campaign, $23 million of which went to advertising.

Incensed by Republican advertisements critical of Senator Barack Obama, several current and former executives came forward to discuss the role that Rick Davis, Senator John McCain’s campaign manager and longtime adviser, played in helping Fannie Mae and Freddie Mac beat back regulatory challenges when he served as president of their advocacy group, the Homeownership Alliance, formed in the summer of 2000.

The candidates echoed each other in assessing the threat from the financial crisis as severe enough to warrant government intervention. But Senator John McCain said that he would press on with his plan to extend the Bush tax cuts and to cut others. Contrary to the warnings of fiscal analysts, he said he could still balance the federal budget, which was falling deeper into deficit even before the financial crisis, by the end of his first term.

Republican candidate John McCain faces the daunting task of trying to square his long history of advocating corporate and financial deregulation - the sort of loose controls many blame for the turmoil on Wall Street. Senator McCain now says more controls are needed to prevent a repeat of the turmoil that sent the stock market plunging, as he tries to recover from a damaging series of gaffes regarding the unfolding crisis.

The Obama and McCain campaigns have agreed to an unusual free-flowing format for the three televised presidential debates, which begin Friday, but the McCain camp fought for and won a much more structured approach for the questioning at the vice-presidential debate, advisers to both campaigns said Saturday.

While Senator McCain has not called for a full privatization of Social Security, he has supported the concept of allowing individuals to invest part of their payroll taxes in stock and bonds. But the idea has taken on a new air of political vulnerability because of the upheaval on Wall Street, which Senator Obama has sought to seize on.

Opponents of the proposed same-sex marriage ban worry that many black voters, enthused by Senator Barack Obama’s candidacy but traditionally conservative on issues involving homosexuality, could pour into voting stations in record numbers to punch the Obama ticket — and then cast a vote for the marriage ban.

Propelled by discontent at Republican handling of the economy in light of the financial crisis, Senator Obama matched his record high of 50 percent in the latest Gallup daily tracking poll, against 44 percent for Senator McCain. Meanwhile, Mr. McCain tried to blame the turmoil on fraud at US mortgage giants Fannie Mae and Freddie Mac.