Barack Obama on Monday aimed to put another dent in John McCain's comeback hopes with a double-bill rally in Florida with ex-foe Hillary Clinton to kick off a frenetic final fortnight of the White House race.

Obama's new offensive follows a quick fire combination of blows to Republican McCain over the weekend including a key endorsement from Colin Powell and the announcement of a stunning $150-million fundraising haul last month.

The Democratic nominee will spend much of the week charging through what was nominally Republican territory, seeking to convert his lead on the electoral map and clear opinion poll edge into a big victory over McCain on 4 November.

In Florida, Obama and Clinton were to headline a joint rally and several separate events on Monday, pitching for a state which had looked solid for McCain, but where a wave of mortgage foreclosures offer the Democrats an opening.

Clinton is popular in Sunshine State

The former first lady is highly popular in the Sunshine State and trounced Obama in the Democratic primary there, but the contest was declared void after Florida violated party scheduling rules.

McCain (72), was meanwhile on the defensive on Monday, attempting to cling onto states that helped send President George W. Bush back to the White House in 2004.

The Arizona senator was campaigning in midwestern Missouri on Monday, after Obama attracted a monstrous crowd of 100 000 people to St. Louis on Saturday.

He will fly onto Pennsylvania, a Democratic state in 2004 and a Republican target this year which now seems clearly tipping towards the 47-year-old Obama.

Just two weeks from election day, McCain's hopes rested on a hard-hitting campaign of mailings and automatic "robo-calls" to voters in swing states assailing Obama's character, past acquaintances and record on abortion.

McCain and his feisty vice presidential running mate Sarah Palin were also seeking to break through with claims that Obama is far more liberal than mainstream Americans, and is bent on pursuing "socialist" tax policies.

Obama a "transformational president"

Powell, a Republican and former secretary of state and chairperson of the Joint Chiefs of Staff, is the highest-ranking African-American ever in US government service.

In a stinging blow to his long-time friend McCain, Powell said on NBC that Obama, vying to be the nation's first African-American commander-in-chief, would be a "transformational president."

In another demoralizing blow to McCain, the Obama campaign announced a record-shattering take of more than $150-million last month — nearly double McCain's budget for the entire general election campaign.

Despite claims by the McCain camp that the race is narrowing, daily tracking polls on Sunday showed a steady Obama lead.

Gallup had Obama up by 52 to 42 percent among registered voters nationwide, reflecting the last presidential debate last week in which Obama was adjudged the winner by most snap polls.

Rasmussen also had Obama above 50 percent, with a 51 to 45 percent lead.

Obama pummel his rival

Obama's fundraising bonanza is helping him pummel his rival in a nationwide advertising blitz and allowing him to pin down McCain in Republican states, stretching his foe's resources even further.

The Democrat said in North Carolina that he was "beyond honored and deeply humbled to have the support of General Colin Powell."

Speaking on Fox News Sunday, McCain said he had "always admired and respected General Powell."

"We're long-time friends. This doesn't come as a surprise," the Arizona senator said, touting his endorsement by other former secretaries of state including Henry Kissinger and James Baker.

McCain on Sunday renewed his condemnation of Obama's economic policies as "socialism" and warned a rally in Toledo in the key swing state of Ohio that Obama planned to "redistribute wealth" to the "more than 40 percent of Americans" who are too poor to pay income taxes.

In North Carolina, Obama told more than 10 000 supporters that McCain backed tax cuts for wealthy corporate bosses who have driven their companies into the ground.

"If John McCain wants to talk about redistributing wealth to those who don't need it and don't deserve it, let's talk about the 700 000 dollar tax cut he wants to give Fortune 500 CEOs, who've been making out like bandits— some of them literally," he said.

AFP