Among the most exclusive opportunities offered to Romney bundlers: a summer retreat in Park City, Utah, later this month.
Presidential candidates can raise up to $50,800 from an individual donor as long as the money goes into a special fund that divvies up the proceeds among the candidate's campaign, his national party, state or local party committees and any other political committee.
For some wealthy supporters, as well as bundlers, a seat at a fundraiser is just the start of what they're after. Big campaign contributions can often be seen as a down payment for future access to the White House or a role in the administration.
Several top Obama donors from the 2008 campaign received ambassadorships, including posts in France, Spain and Switzerland. Other prominent supporters have been awarded positions on presidential advisory boards.
Tens of thousands of dollars can also buy top donors invitations to swanky White House events. More than 30 bundlers made the guest list for Obama's recent state dinner for British Prime Minister David Cameron.
Obama is hardly the first president to grant special status to big money donors. Former Presidents George W. Bush and Bill Clinton both reserved seats at exclusive state dinners for supporters who made substantial financial contributions to their re-election campaigns. And if Romney is elected, he'll likely do the same, as well.
Clinton said during his presidency that high-dollar donations bought supporters a "respectful hearing if they have some concern about the issues." But he said: "Nobody buys a guaranteed result."
Associated Press writers Jim Kuhnhenn, Steve Peoples and Kasie Hunt in Washington contributed to this report.
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