'A huge bellwether': What a close race in Tennessee special election could mean for the midterms

All eyes are on Tennessee's special congressional election on Tuesday, as a recent poll shows the race tightening between Democrat Aftyn Behn and Republican Matt Van Epps. Holly McCall, Editor-in-Chief of The Tennessee Lookout, joins The Weekend: Primetime to discuss the significance of this race in the state and nationally. "If Behn wins, even if she gets close, this is a crack in Tennessee's Republican foundations," McCall says. "And if Tennessee starts to crack, it also bodes, I think, well for Democrats in next year's midterms."