The Associated Press is reporting that Chatham attorney John Chapman has won the Republican Party's nomination to take on incumbent Democratic Congressman Bill Keating in the ninth Congressional District race.

The race was a tight one with his Chapman beating his nearest opponent, Falmouth Marine Biologist Mark Alliegro by just over 500 votes.

Chapman issued a post on his Facebook page where he thanked his opponents and said he will hold Keating, "accountable for his votes against securing the border, for the new irresponsible flood maps and for reckless spending."

Keating faced no opposition in his primary.

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