President Donald Trump's political muscle in Republican nomination races was on full display Tuesday as a candidate he endorsed last week won a crowded and competitive GOP special election primary for a vacant congressional seat in Tennessee. Trump-backed Matt Van Epps, a former commissioner of the Tennessee Department of General Services, came out on top in a field of 11 Republican candidates vying to fill the seat in the state's solidly red 7th Congressional District, according to the Associated Press. Van Epps will now be the favorite in the Dec. 2 general election in the race to succeed former Republican...