NBC News’ Steve Kornacki details what to look for as the polls close in the special election for Tennessee’s 7th Congressional District.

After months of campaigning, canvassing and endorsements, Republican Matt Van Epps claims the win for the 7th Congressional District seat over challenger Democrat Aftyn Behn.

A Behn victory would flip the deep-red seat for the first time in more than four decades, while a Republican win would reaffirm the party’s grip on reliably red territory, breaking a building wave of ...