Indiana Sen. Joe Donnelly (D) and his challengers Mike Braun (R) and Lucy Brenton (Libertarian) will face off in Indiana's final Senate debate before next week's midterms.

Donnelly is fighting to keep his seat in a state President Trump won in 2016 by nearly 20 points. The one-term senator is down 3 points to Braun, according to a Cygnal poll released Tuesday.

The debate is scheduled to begin at 7 p.m.

Watch the live video above.