MADISON - Two Democratic lawmakers asked regulators Tuesday to review whether Republican gubernatorial candidate Scott Walker's campaign violated a law that bans fundraising in state buildings.

Reps. Marlin Schneider of Wisconsin Rapids and Amy Sue Vruwink of Milladore asked the Government Accountability Board for the investigation.

The lawmakers pointed to a Nov. 2 event by Walker supporters at the University of Wisconsin-Stevens Point student center that was described in a local news report as "a fundraising rally."

Walker's campaign said last week that student groups on college campuses were "holding coordinated efforts to drive support and donations to the campaign" one year before the election.

Schneider and Vruwink noted that Wisconsin law bans the use of state-owned buildings for requesting and collecting political donations.

"These statutes exist to form a firewall between the university and political fundraising at state-owned campuses," said Schneider, the longest-serving member of the Assembly. "This is serious."

Walker campaign spokeswoman Jill Bader said Students for Walker received permission from the school to host the event, which she described as a "recruitment drive." She said no money was raised at the event.

"It's sad the Democrats find it necessary to go after college kids who are volunteering and sharing Scott's message with other students," she said.

A reporter who was at the event, Nick Paulson of the Stevens Point Journal, said one of the organizers "gave every indication it was a fundraiser." He said Walker supporters told him they had not yet raised any money while he was there.

The University of Wisconsin System started looking into the event after reading about it in the newspaper, spokesman David Giroux said. He said a preliminary review by a system attorney found nothing wrong with it, but additional analysis may be necessary.

Walker's campaign announced that it raised more than $25,000 during the "one-day push for donations" on Nov. 2.

Walker, the Milwaukee County Executive, is running against former U.S. Rep. Mark Neumann for the Republican nomination to succeed Democratic Gov. Jim Doyle, who is leaving after two terms.