LANSING, Mich. (AP) -- Primary voters will begin determining what could be one of the bigger shake-ups in Michigan's congressional delegation in years.
The revamp may become even larger if Republican challengers topple conservative congressmen.
The Aug. 5 primary features four open seats, heavily-financed challenges to two Republican incumbents and the start to replacing the longest-serving member of Congress in history, Democrat John Dingell.
Dingell's wife, Debbie, is in line to succeed him. Due to gerrymandered boundaries, whoever wins the incumbent party's primary in three other open seats is well positioned to go to Washington.
Also stepping aside this year are Republicans Dave Camp and Mike Rogers. A fourth seat is opening because Democratic Rep. Gary Peters is running for the Senate seat opening with Democrat Carl Levin's retirement.
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