The CNN host thanked his Fox News rival for having his back during the "Fredo" video incident.
"We never learn!" the president tweeted in response to high-profile figures, including Fox News' Sean Hannity, backing Cuomo after a man called him "Fredo."
The new apparel is the latest in the campaign's line of rage-baiting merchandise.
After a man allegedly called him "Fredo" in an argument, the CNN host was seen on video claiming that the insult is comparable to "the n-word."
CNN defended its primetime host, calling the incident "an orchestrated setup."
The CNN host also advised Trump how to behave in his visit to the victims of the weekend's mass shooting in El Paso, Texas.
Kris Kobach, former secretary of state of Kansas, struggled when asked what he'd do if Trump admitted he was a racist.
The musician also told CNN’s Chris Cuomo how he tackles Trump-supporting hecklers.
O'Donnell thinks the former vice president would be better deployed elsewhere in the Democratic fight against Donald Trump.
"The one thing you cannot say about Joe is that he’s a racist," she said of her husband, the former vice president and 2020 Democratic presidential hopeful.
"What I didn’t want to do was get into that scrum," he said of his debate stage standoff.
The 2020 hopeful also said it would be "great" to have a female president if he doesn't win the Democratic nomination.
The Democratic 2020 candidate told CNN's Chris Cuomo that Trump is "the bully that I’ve always stood up to."
“Sorry, that picture. I can’t even look at it. I can’t even look at it," said the CNN host.
The CNN host warned "we will all be responsible for what may happen on our watch" as he torched both sides of Congress for their failure to act.
"There’s nothing ‘great again’ about taking America down the path of the despot," said the CNN host.
The CNN host made a dire prediction about the 2020 election as he dissected Robert Mueller's press conference.
The president lashed out in a tweet in which he again called Lemon "the dumbest man on television."
The CNN host also suggested why special counsel Robert Mueller should appear before Congress.
The CNN host said there's a way the crowded Democratic field can become an asset.