Rep. Kerry Bentivolio (R-Mich.) lost his primary to businessman Dave Trott on Tuesday, becoming just the third sitting member of Congress to lose in a primary this year.
Bentivolio, who has frequently clashed with GOP leaders, entered the day as an underdog. He was outraised by Trott and ran a turbulent campaign punctuated by a staff shuffle in the spring.
With 60 percent of the vote tallied, the Associated Press called the race for Trott, who led Bentivolio, 66 percent to 34 percent.
Trott was backed by the U.S. Chamber of Commerce, the nation’s largest business group.
The other two House members who lost this year are Rep. Ralph Hall (R-Tex.), the oldest member of the lower chamber; and Rep. Eric Cantor (R-Va.), who was the second-ranking Republican.
Bentivolio was first elected in 2012 as an unknown after then-Rep. Thad McCotter (R) unexpectedly failed to qualify for the ballot at the last minute.
Trott will begin as the favorite in the general election. Mitt Romney (R) won the district with 52 percent of the vote in the 2012 presidential election.