Wisconsin Republican Sen . Scott Walker won re - election Tuesday , CNN projects . He defeated Democrat Mary Burke , a businesswoman and member of the Madison school board . Walker is now positioned for a potential 2016 run for the GOP presidential nomination .
Wisconsin Republican Gov . Scott Walker won re-election Tuesday , CNN projects . He defeated Democrat Mary Burke , a businesswoman and member of the Madison school board . Walker is now positioned for a potential 2016 run for the GOP presidential nomination .