President Donald Trump’s Texas rally for Republican Senate nominee Ken Paxton was repeatedly interrupted by protesters on Wednesday, drawing loud boos from the crowd and sharp jeers from the president.

Trump was forced to stop several times during his speech to supporters in San Antonio after multiple hecklers in the crowd caused a kerfuffle, leading security to intervene. The president joked that one of the protesters was going to get “hell” at home because “his mom voted for Trump.” At another point, Trump claimed that the disruptions were coordinated by “enemies of our nation.”