A conservative group is taking their message of Minnesota voter fraud to the streets with a $50,000 radio and billboard campaign.

The campaign will offer cash rewards, up to $500, for anyone who turns in a fraudster who is successfully prosecuted.

The group, which includes folks from the conservative Minnesota Majority as well as North Star Tea Party Patriots, has long taken aim at Democratic Secretary of State Mark Ritchie and Attorney General Lori Swanson. Members have also pushed for requiring photo id at the polls, something many Republicans support and many Democrats do not.

Meanwhile, Dan McGrath, of Minnesota Majority, said they've "uncovered" new evidence of fraud in both the 2008 election and the 2010 primary.

McGrath said that a "very generous donor" has offered to pay for any rewards won but the donor prefers to remain anonymous.