The president grew angry when Welker asked for Trump to back up his claims with evidence. He instead insulted the NBC anchor and ended the interview.

An angry Donald Trump walked out of an interview with NBC’s Meet the Press host Kristen Welker after an extraordinary exchange in which the president angrily insisted–without offering any proof–that “elections are crooked and you’re crooked, and Meet the Press is crooked…and so is ABC and CBS and CNN.”

The interview, airing on NBC Sunday, turned confrontational when Welker asked Trump about his idea to use $1.8 billion in taxpayer money for a “weaponization fund” to compensate people who believe they were unfairly targeted by a federal government “weaponizing” the justice system against them.