NBC News/Marist polled possible match ups for governor in three key Midwestern states:
• In Wisconsin, Tony Evers (D) leads Gov. Scott Walker (R), 54% to 41%.
• In Michigan, Gretchen Whitmer (D) leads Bill Schuette (R), 47% to 38%.
• In Minnesota, Lori Swanson (D) leads Tim Pawlenty (R) 51% to 40%, while Tim Walz (D) leads Pawlenty (R) 51% to 40%.