Former Sen. Norm Coleman hasn't gotten involved in Minnesota politics this election season — until now.

Coleman's group, "action tank" American Action Network, is reportedly making a $19 million ad buy to target House races in 22 districts across the country, including against First District Democratic Rep. Tim Walz, Politico reported.

The new ad campaign follows a media buy topping $100,000 from the National Republican Congressional Committee against Walz that launched last week.

The American Action Network, which Coleman serves as CEO, is one of several outside conservative groups planning to spend $50 million against Democrats in the House this election.

Coleman's organization is operating under a new campaign finance landscape created this year after the Supreme Court's Citizens United ruling, which granted corporations and unions the ability to spend an unlimited amount of money supporting and opposing candidates.