(CNN) - President Barack Obama is responsible for the start of the Occupy Wall Street movement, according to former New York City Mayor Rudy Giuliani.
"It would not have happened but for his class warfare," Giuliani said in Washington on Friday. "And remember, as it gets worse and worse - because it's going to get worse and worse - where it came from: Barack Obama."
Giuliani's remarks came while speaking at a summit sponsored by Americans for Prosperity, a conservative organization with deep ties to the tea party movement.
Presidential front-runners Mitt Romney and Herman Cain also spoke at the event.
Giuliani said Obama's economic philosophy–which the former mayor describes as the need to "redistribute the wealth"–closely lines up with the message of the growing movement.
The movement started out as a group of demonstrators on Wall Street upset over unemployment and the economy. It has since expanded to cover a variety of issues, including the wars in Iraq and Afghanistan. Similar protests have popped up in cities around the world, some of which have been marked by violence.
One faction of the movement even proposed occupying the offices of presidential candidates in Iowa ahead of the caucuses and primary season, which starts January 3.
"I believe this will be the millstone around Barack Obama's neck that will take his presidency down," Giuliani said.
Obama commented on the booming movement in October, saying it "expresses the frustrations that the American people feel."
"People are frustrated and the protesters are giving voice to a more broad-based frustration about how our financial system works," Obama said while taking questions at a news conference about his jobs plan.
The president highlighted the financial regulation bill passed in 2010 as an example of government working to ensure a fair, rule-abiding financial sector.
"The American people understand that not everybody's been following the rules," he said. "That Wall Street is an example of that."
According to an ORC International Poll released Thursday, more Americans say they support the movement as it progresses. Thirty-six percent say they agree with the overall positions of Occupy Wall Street, up from 27% when the survey was last conducted in early October.
Giuliani flirted with a presidential bid for much of the year but announced his decision against running last month.
- CNN's Kevin Liptak contributed to this report.
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