Trump looms large over special election primary in deep-red congressional district

President Donald Trump's immense political clout in Republican nomination races faces a test Tuesday in a crowded and competitive GOP special election primary for a vacant congressional seat in Tennessee.The primary election comes after Trump late last week endorsed one of the 11 Republican candidates vying to fill the seat in Tennessee's 7th Congressional District, which was vacated by GOP Rep. Mark Green, who resigned from office in June to take a private sector job.Trump endorsed Matt Van Epps, a former commissioner of the Tennessee Department of General Services, in a field that also inclu