The biggest independent spender is the conservative organization Americans for Prosperity.
A campaign-finance watchdog says independent groups are still dominating television advertising in Michigan's top two statewide political races.
Gubernatorial and U.S. Senate candidates accounted for about $4 million of about $18 million in ad spending through Monday.
The biggest independent spender is the conservative organization Americans for Prosperity, which the Michigan Campaign Finance Network says spent at least $4.3 million attacking Democratic Senate candidate Gary Peters.
Senate Democrats' super PAC spent $2 million criticizing Republican Senate candidate Terri Lynn Land.
In the governor's race, Republican Gov. Rick Snyder spent $1 million on ads and was aided by $1.5 million spent by the Republican Governors Association. Democrat Mark Schauer bought no ads and relied on $2.9 million in Democratic Governors Association TV ads.
Viewers with disabilities can get assistance accessing this station's FCC Public Inspection File by contacting the station with the information listed below. Questions or concerns relating to the accessibility of the FCC's online public file system should be directed to the FCC at 888-225-5322, 888-835-5322 (TTY), or firstname.lastname@example.org.