The Michigan LCV offered its support for McDowell in the ad and in a statement Tuesday.
The group’s national outfit has targeted Benishek as part of a broader $1.5 million ad campaign against five GOP House incumbents who have expressed skepticism about global warming and also have connections to the fossil fuel industry.
Raffi Williams, a spokesman for the Benishek campaign, said the LCV ad is an example of groups "dumping millions of dollars to distort the truth against us." He touted Benishek's work on getting legislation to curb the infiltration of the invasive Asian carp species into the Great Lakes and his role on the Great Lakes Task Force as evidence of the congressman's support of the state's waters.
"He would never poison the Great Lakes or try to make them worse because he knows how important they are for northern Michigan -- not only for the lifestyle, but for the economy," Williams said.