Michelle Obama campaigns for Mary Burke

Wisconsin Democratic gubernatorial candidate Mary Burke, left, and first lady Michelle Obama wave to supporters during a campaign event at the Overture Center in Madison, Wis., Tuesday, Oct. 7, 2014.

First lady Michelle Obama ends her speech, cheering with the crowd as Burke returns to the stage at the campaign event.

First lady Michelle Obama and Wisconsin Democratic gubernatorial candidate Mary Burke shake hands with on-stage attendees at the end of the campaign event.

First lady Michelle Obama gives handshakes and hugs to supporters before leaving the campaign event.