After the president slammed the late-night host for discussing the grief he got after tussling Trump's hair on his show, Fallon further addressed his comments during his Monday night monologue.
The hair-tussling incident occurred during a Sept. 15, 2016, episode of NBC’s ‘The Tonight Show.’

Jimmy Fallon is talking about President Donald Trump once again during the Tonight Show‘s Monday monologue after Trump called out the late-night host for “whimpering” about tussling his hair on his appearance during his presidential campaign.

“Before we begin, I just wanna give a shout out to our show’s number one fan – the President of the United States,” the late-night host was quick to quip about the president.

Trump on Sunday attacked the late-night host over the Tonight Show host’s recent comments, during a Hollywood Reporter “Awards Chatter” podcast episode, in which Fallon became choked up talking about the grief he got after tussling Trump’s hair on his show. During the taping of Trump’s appearance, Fallon asked for and was granted permission to “mess up” Trump’s hair, which has been the source of mockery and curiosity over the years.

Fallon was instantly attacked over the move for attempting to “humanize” Trump to the public.

Trump wrote on Twitter: “.@jimmyfallon 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 called & said ‘monster ratings.’ Be a man Jimmy!”

Jimmy Fallon

“As you may have heard, last night, the President of the United States went after me on Twitter. So Melania, if you’re watching, I don’t think your anti-bullying campaign is working,” Fallon said.

Continuing, Fallon called out Trump for failing to acknowledge any other “important things.” “When I saw that Trump insulted me on Twitter, I was gonna tweet back immediately, but I thought, ‘I have more important things to do.’ Then I thought, ‘Wait – shouldn’t HE have more important things to do? He’s the president! What are you doing? You’re the president! Why are you tweeting at…