Cal Cunningham concedes North Carolina U.S. Senate race to incumbent Sen. Thom Tillis

Democrat Cal Cunningham has conceded the U.S. Senate race.

In a statement released via his official Twitter account Tuesday, Cunningham said he called his opponent, Republican Sen. Thom Tillis, "on winning re-election to a second term in the U.S. Senate and wished him and his family the best in their continued service in the months and years ahead."

Cunningham stayed in the race despite a personal sex scandal. According to the Associated Press, he acknowledged exchanging sexually suggestive texts with a woman who is not his wife.

This race is one of, if not the most expensive in history.

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