James Mackler, a candidate for the U.S. Senate seat currently held by Bob Corker, will speak at a potluck dinner hosted by the DeKalb County Democratic Party on July 27 at 6 p.m. at the high school. Mackler, a Nashville attorney and Iraq War veteran, is the first Democrat to announce a run for the seat. Former Nashville mayor and gubernatorial candidate Karl Dean and Holly McCall, Recruitment Coordinator for Emerge Tennessee will also speak at the event.