Trump tweeted on Sunday night, saying Fallon is "now whimpering to all that he did the famous 'hair show' with me (where he seriously messed up my hair), & that he would have now done it differently because it is said to have 'humanized' me-he is taking heat."
He concluded by saying, "He called & said 'monster ratings.' Be a man Jimmy!"
Trump is referencing a recent interview Fallon did with The Hollywood Reporter where he spoke about the backlash he received after Trump's appearance.
"I did not do it to 'normalize' [Trump] or to say I believe in his political beliefs or any of that stuff,” Fallon told THR.
The show suffered a ratings dive after the interview, which hurt Fallon personally.
“It was definitely a down time,” he said in the interview. “...You go, ‘Alright, we get it. I heard you. You made me feel bad. So now what? Are you happy? I'm depressed ... What do you want me to do? ... What would make you happy?"
He added that if he had it do all over again he "would do it differently.”