President Trump will host a rally in Las Vegas on Thursday night to support incumbent Republican Sen. Dean Heller, who is facing a challenge from Democratic Rep. Jacky Rosen to retain his Senate seat in November's midterm elections.

The Cook Political Report, a nonpartisan election handicapper, has labeled the Senate race a toss-up.

The event is scheduled to begin at 10 p.m. EST.

Watch the live video above.