It all started when three UCLA basketball players -- including LaVar's son, LiAngelo -- were arrested for shoplifting in China. Trump -- who was in China at the time -- reportedly asked China's president, Xi Jinping, to release the boys, who were facing years of possible jail time.
Shortly after, Trump tweeted, "Do you think the three UCLA Basketball Players will say thank you President Trump?" Hours later, the boys spoke to the media for the first time since being back in the United States, admitted to the shoplifting and thanked Trump. LaVar, on the other hand, was not as grateful -- or as PC.
When a reporter from ESPN asked the basketball patriarch about Trump's role in helping out his son and teammates, LaVar replied, "Who? What was he over there for? Don't tell me nothing. Everybody wants to make it seem like he helped me out."
Trump then "took the bait," as Stephen Colbert put it, tweeting, "Now that the three basketball players are out of China and saved from years in jail, LaVar Ball, the father of LiAngelo, is unaccepting of what I did for his son and that shoplifting is no big deal. I should have left them in jail!"
"Shoplifting is a very big deal in China, as it should be (5-10 years in jail), but not to father LaVar," he continued. "Should have gotten his son out during my next trip to China instead. China told them why they were released. Very ungrateful!"
On Monday's "Late Show," Colbert joked that LiAngelo's shoplifting scandal is "easily the most scandalous thing to happen in a mall that didn't involve Roy Moore," alluding to the disgraced Alabama Senate candidate's recent ban from an Alabama mall for allegedly hitting on a high-school-age girl.
"Imagine Thanksgiving at the Trump house," Colbert joked before imitating Trump. "'Let's go around the table and all say what we're thankful to me for -- I'll start.'"
"Ball has made a career out of baiting people to get publicity for his company, Big Baller Brand, which is a basketball lifestyle brand and not, as I thought, a company that makes pants for men with husky testicles," the late-night host said.
Of LaVar's response to EPSN, Colbert joked, "Pretending not to know him is the meanest thing you can do to Donald Trump. Knowing who he is is his whole thing. That's why he puts his name on all of his buildings and one of his kids."
"Say what you want about Donald Trump -- and I do -- but he is the president, and far above responding to a publicity hungry troll," Colbert said, barely keeping a straight face. "President What's His Name took the bait."
"Mr. Trump, Mr. Trump, I know you're upset," Colbert said, "but maybe now's not the time to be implying that someone's kid should go to jail for what their dad did."
Meyers accused Trump of "starting to sound like a mean girl in eighth grade" for saying, "Do you think the three UCLA Basketball Players will say thank you President Trump?"
"Do you think Becky will thank me for letting her sit with us at lunch? She was headed for 10 days at the losers table," the "Late Night" host joked in his best eighth grade girl's voice.
"Helping to keep American citizens out of communist prisons is part of your job," Meyers said. "That's not above and beyond, that's eye-level and right next to you."
"At this point," he continued, "I wouldn't be shocked if Trump put a jar at his desk for tips."
Meyers also slammed the president for saying he should have left LiAngelo and his teammates in jail.
"Every time I think Trump has hit rock bottom, he just bursts through the rock and keeps falling," the late-night host joked. "He probably got to China by falling through the center of the earth and popping out the other side."
Corden briefly dug into "America's favorite president" on Monday's "Late Late Show," saying, "Paul Manafort and the rest of Trump's campaign staff were like, 'Hahahahahahahahahaha -- OK, let's not talk about leaving people in jail."