BELLEVILLE, Ill. (AP) — The fall race for the state’s only open congressional seat will feature Republican lumber businessman Jason Plummer and Democratic former regional schools superintendent Brad Harriman.

Longtime Democratic Congressman Jerry Costello announced last October that he won’t seek another term in the southern Illinois district after more than two decades.

Costello’s tenure is the longest of any Democrat in Illinois’ congressional delegation.

Democrats have held the seat since World War II. Republicans see it as an opportunity to flip the seat into the GOP column. The district runs from St. Louis’ Illinois suburbs to the state’s southernmost tip.

Three Democrats and three Republicans were on the ballot.

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