Tom Barrett said he's asking the state Department of Public Safety to look into whether the solicitation constitutes a raffle, which would violate Minnesota gambling laws.
The campaign's Web site is asking for funds of up to $2,300. As an incentive, the site says anyone who makes a contribution of $5 or more through July 31 "could be one of 10 supporters chosen to meet Barack backstage" in Denver at the Democratic National Convention.
A spokesman for Obama's campaign in Minnesota said the solicitation isn't a raffle.
Only nonprofit charities may conduct raffles in Minnesota, not political campaigns.
Obama spokesman Nick Kimball said the campaign isn't doing a drawing. Instead, the campaign will consider individual stories and other factors to select a group to meet Obama.

