Tonight on The Last Word: Democratic Sen. Cortez Masto closes the gap in the tight Nevada Senate race. Also, NBC News projects that Democrat Adrian Fontes wins Arizona's secretary of state election. And the Georgia runoff could determine the Senate's balance of power. Steve Kornacki, Rep. Greg Stanton, Sen. Jacky Rosen, Sen. Amy Klobuchar, Arizona Secretary of State-elect Adrian Fontes and Rep. Nikema Williams join Lawrence O'Donnell.