Davis is first lawmaker to call for an Oscar boycott.
In The Know
Lovato opened for Clinton by performing some songs during a campaign stop.
"Malia's school asked if I wanted to speak at commencement and I said no," he said.
"When you do a proposal, it has to be done with ambience," Sanders joked.
The rocker said they should be tried for treason over the Benghazi attacks.
Trump unveiled the endorsement at a museum dedicated to the actor.
The hip-hop star appeared in the spin room for Sanders after Sunday's debate.