The special election in Tennessee’s 7th Congressional District, decided last night, offered a telling look at where voters stand, what they fear, and what they expect from those who claim to fight for them. Matt Van Epps’s victory was proof that, even in a season of economic worry, GOP strength still holds when the candidate matches the moment. And when national leadership delivers enough progress for voters to feel momentum. Van Epps began this race under a cloud of doubt. His service record was unimpeachable, with nine combat tours in Iraq and Afghanistan and a reputation for disciplined leadership. However,...