Little Rock, Arkansas (Reuters) - Arkansas Republican Congressman Tom Cotton will formally announce next week that he will run against Democratic U.S. Senator Mark Pryor in what is likely to be one of the most hotly contested 2014 U.S. Senate races, a Republican source said on Wednesday.
The source, with direct knowledge of the decision, said Cotton has scheduled an event in his hometown of Dardenelle, Arkansas, for August 6 to announce his challenge to the moderate Pryor, one of the most vulnerable Democratic incumbents in the Senate.
(Reporting Suzi Parker in Little Rock; Writing by Greg McCune; Editing by Dan Grebler)
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