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Former Tennessee Gov. Phil Bredesen speaks at a ceremony in Chattanooga, Tenn., on Thursday, Oct. 29, 2015, to name an interstate exchange near the Volkswagen plant after himself and former Hamilton County Mayor Claude Ramsey, right. Bredesen is expected to announce his candidacy for retiring US Sen. Bob Corker

Former Tennessee Gov. Phil Bredesen speaks at a ceremony in Chattanooga, Tenn., on Thursday, Oct. 29, 2015, to name an interstate exchange near the Volkswagen plant after himself and former Hamilton County Mayor Claude Ramsey, right. Bredesen is expected to announce his candidacy for retiring US Sen. Bob Corker