Acosta posted a video from Trump’s rally in Tampa, Fla., on Tuesday showing supporters shouting down members of the press. At one point, one man in the crowd looks into the camera and yells, “stop lying.”

“Just a sample of the sad scene we faced at the Trump rally in Tampa,” Acosta tweeted. “I’m very worried that the hostility whipped up by Trump and some in conservative media will result in somebody getting hurt. We should not treat our fellow Americans this way. The press is not the enemy.”