President Barack Obama mocked Republican presidential nominee Donald Trump over reports that his campaign had blocked him from having access to Twitter. Obama said that a person who could not be trusted with a Twitter account could not be trusted with the nation’s nuclear codes.

“In the last few days they have had so little faith in his self-control that they took away his Twitter account,” Obama said to laughter from the crowd during a rally Sunday for Democratic presidential nominee Hillary Clinton in Kissimmee, Fla.