U.S. Sen. Bob Corker has his first Democratic challenger for the 2018 election. (Photo: Staff)

Nashville attorney and Iraq war veteran James Mackler is expected to become the first Tennessee Democrat to challenge U.S. Sen. Bob Corker in the 2018 election. 

The Tennessean reported that Mackler would announce Monday his plans to oppose Corker, R-Tennessee, who is also Chattanooga's former mayor. 

"Our country has become so divided that our leaders refuse to work together to solve our most important problems," Mackler said in a statement, according to The Tennessean. "As a veteran, I know firsthand the strength of teamwork, cooperation, and the benefits of diversity to accomplish even the most difficult mission."

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