Independent sources have funded most of Michigan's gubernatorial and US Senate races - that's instead of candidates funding themselves.

The Michigan Campaign Finance Network's Rich Robinson says, independent spenders have been dominating the "air wars" in both races.

Governor Rick Snyder has spent $1.2 million on TV ads through Labor Day, the Republican Governor's Association has spent well over $3 million dollars touting the governor.

Democratic gubernatorial nominee Mark Schauer has spent $832,000 dollars, the Democratic Governor's Association has spent $4.6 million supporting him.

TV ad campaigns favoring both US Senate candidates, Democrat Gary Peters and Republican Terri Lynn Land, are also mostly financed by independent groups instead of the candidate's campaigns.

Independent spending accounts for 66 percent of spending on ads for Land, and independent spending for Peters accounts for 85 percent.