Anna Wintour raised at least $500k for Obama’s re-election bid

President Obama's re-election campaign has credited the "grassroots" for the whopping $86 million Obama raised for his 2012 bid and the Democratic National Committee between April and June.

But a significant chunk of that fundraising haul came to the campaign though big-money donors who raised serious cash for Obama over the last three months. On Friday, the Obama campaign voluntarily released a list of 244 "volunteer fundraisers" who raised at least $50,000 apiece for Obama's re-election bid.

The tally disclosed 27 donors who bundled contributions of $500,000 or more--a list that included well-known figures like Vogue Magazine editor Anna Wintour, former New Jersey Gov. Jon Corzine and Hollywood producer Jeffrey Katzenberg.

Another 41 donors raised between $200,000 and $500,000, 89 raised between $100,000 and $200,000 while 87 raised between $50,000 and $100,000.

The money is being split between Obama's official campaign account and the Obama Victory Fund, a joint fundraising account the campaign has set up with the Democratic National Committee.

The Obama campaign has reportedly asked its top supporters to raise at least $350,000 a piece for the primary and another $350,000 for the general ahead of next year's campaign. Obama is aiming to raise at least $750 million for his 2012 re-election bid—a total that does not include the cash it plans to raise for the joint campaign/DNC account.

During the 2008 election, 560 bundlers raised nearly $77 million for Obama's presidential bid—a total that added up to roughly 10 percent of what he raised during the entire cycle.

But Obama isn't the only candidate to rely on big dollar donors to raise cash. Mitt Romney, Jon Huntsman and other 2012 GOP hopefuls are also relying on bundlers to raise cash. On Friday, the Obama campaign called on their GOP rivals to make their list of bundlers public as well.