MADISON, Wis. -

After news broke that prosecutors saw Gov. Scott Walker as a key part of a nationwide criminal scheme to coordinate fundraising with conservative groups, his Democratic opponent said nothing.

Instead, Mary Burke limited her public comments Thursday to the latest jobs numbers. The employment figures show the state ranked 37th in job growth nationwide last year.

Burke, a former state commerce secretary and Trek Bicycle Corp. executive, is running her first statewide campaign in an effort to take out Walker.

A Marquette University Law School poll released last month showed the race to be tied among registered voters.

Burke's campaign spokesman didn't address the latest news directly, saying only that "Wisconsinites deserve a governor they can trust."

No charges have been filed against Walker or any member of his staff.