Yet, he broke into a "dance" at Kirk’s memorial ceremony, making his grieving widow Erika Kirk smile.
Trump and his supporters were part of the memorial service of 31-year-old at State Farm Stadium in Arizona's Glendale on Sunday.
Trump, who was the final speaker celebrated the life of the conservative activist using the language of religious fervour.
"He's a martyr now for American freedom," Trump said of Kirk, who was killed on September 10 at a Utah university campus.
"I know I speak for everyone here today when I say that none of us will ever forget Charlie. And neither now will history."
Videos flooded social media, with one of them showing the US President “grooving and seen lip-synching the word "America" as the choir sang 'America The Beautiful' in the backdrop. In the clip, Erika Kirk can be seen smiling
The video, a X user, Michael Tracey, wrote, "Trump does a funny little dance alongside Charlie Kirk's bereaved widow."
Some found Trump's actions inappropriate.
An X user, Morgan J. Freeman, wrote, "Inappropriate doesn't even come close to describing whatever the fuck this is."
