LANSING, Mich. (AP) — Nearly $19 million has been spent on TV ads in Michigan's U.S. Senate race through Labor Day.
Republican Terri Lynn Land's campaign and her allies spent $11.9 million, almost $5 million more than Democrat Gary Peters and his allies.
The single biggest spender to date has been Americans for Prosperity, the billionaire Koch brothers-backed conservative group that went off the air in June after spending $4.4 million, according to the Michigan Campaign Finance Network. Land's campaign has spent nearly $4 million.
The Senate Majority PAC, which is run by former aides to Senate Majority Leader Harry Reid, was the biggest supporter of Peters, spending $3.1 million. On Wednesday, NextGen Climate, a liberal group backed by billionaire Tom Steyer, announced a $3 million TV, radio and digital ad campaign in Michigan.