Boileau was first elected a Republican to the Seventy-second United States Congress as the representative of Wisconsin's 8th congressional district. For his next term he redistricted to Wisconsin's 7th district and was reelected to the Seventy-third Congress. He was then reelected to the Seventy-fourth and Seventy-fifth Congress but ran as a member of the Wisconsin Progressive Party still representing Wisconsin's 7th district.
Boileau was initially elected as a Republican to the Seventy-second United States Congress from Wisconsin's 8th district. For his subsequent term, he redistricted to Wisconsin's 7th district and was reelected to the Seventy-third Congress. He then continued to be reelected for the Seventy-fourth and Seventy-fifth Congresses but ran as a member of the Wisconsin Progressive Party still representing Wisconsin's 7th district.