Lansing Mayor Virg Bernero has jumped out to an 8-point lead in Tuesday's Democratic gubernatorial primary in Michigan. Bernero leads with 40% of the vote to state House Speaker Andy Dillon's 32%, with 28% remaining undecided. The result comes from a new EPIC/MRA survey conducted for the Detroit Free Press and WXYZ-TV.
Bernero had trailed Dillon by 10 points in the pollster's last survey in June and by 9 points in a Detroit News poll earlier this month. Helping his cause in this survey, Bernero leads 51%-26% among union voters.
The Free Press reports that the poll "suggests that an aggressive, pro-Bernero, anti-Dillon TV ad campaign -- underwritten by large labor unions and run through the Genesee County Democratic Committee -- has moved many undecided voters into Bernero's camp."
The survey of 400 likely voters was conducted July 24-26 with a 4.9% margin of error.
Bernero or Dillon will face the winner of the competitive Republican primary, where three candidates -- Rep. Pete Hoekstra, Attorney General Mike Cox and businessman Rick Snyder -- were running within 6 points of each other in the latest poll.
Kyle Trygstad is a Washington correspondent for RealClearPolitics. Email him at: kyle@realclearpolitics.com. Follow him on Twitter @KyleTrygstad.