Kim Darroch, the British ambassador to the United States who criticized President Trump's administration in leaked diplomatic cables and who Trump in response pledged to "no longer deal with," has announced his resignation.

"The current situation is making it impossible for me to carry out my role as I would like," Darroch said on Wednesday, The Washington Post reports. He went on to say that the "responsible course" is to step aside.

The U.K. ambassador faced heavy criticism from Trump after he described the president as "inept" and "insecure" in leaked memos. In response, Trump on Twitter pledged that "we will no longer deal with" Darroch, who he went after in subsequent tweets as "wacky," a "very stupid guy," and a "pompous fool."

Britain stood by Darroch in the wake of Trump's criticism, and on Wednesday, British Prime Minister Theresa May thanked Darroch for his "lifetime of service" and said that "good government depends on public servants being able to give full and frank advice," The Guardian reports. She added, "I want all our public servants to have the confidence to be able to do that." Brendan Morrow

Mort Drucker, the beloved artist known for his work at MAD magazine, has died at 91.

Drucker died Wednesday at his home in New York, his friend John Reiner confirmed to The New York Times. Reiner told CNN's Jake Tapper his death was not thought to be related to COVID-19.

After joining MAD in 1956, Drucker's hilarious caricatures satirizing pop culture soon became iconic, and he illustrated more than half of the magazine's movie parodies from the 1960s through 2008, per the Times. In a 2000 interview with the Times, he noted, "I think I've drawn almost everyone in Hollywood."

Among Drucker's other notable work includes the poster for George Lucas' American Graffiti; according to The Hollywood Reporter, Lucas personally drove to Drucker's home on Long Island to convince him to draw it.

"The World has lost a not just an extraordinary talent but a shining example of kindness, humility and humor," the National Cartoonists Society said in a statement.

MAD fans on Thursday quickly began sharing their favorite cartoons from Drucker's legendary career, including his parodies of Jaws and Star Wars. "Many of his illustrations are as vivid in my mind as the movies and TV shows that inspired them," The New York Times' Dave Itzkoff wrote.

Reiner told CNN's Jake Tapper that Drucker's final words to him were, "I'm the luckiest man — I've had a wonderful life." Brendan Morrow

First lady Melania Trump is officially donning a face mask during the COVID-19 pandemic, although the jury's still out on whether her husband will follow suit.

In a social media post Thursday, the first lady shared a photo of herself wearing what appears to be a surgical mask, touting the Centers for Disease Control and Prevention's recommendation "to wear cloth face coverings."

"Remember, this does NOT replace the importance of social distancing," she wrote. "It is recommended to keep us all safe."

Melania's masking comes one week after President Trump announced he would not be wearing a mask, despite the CDC-issued guidelines urging people to do so. At the time, Trump implied that it would be odd to be "sitting in the Oval Office, behind that beautiful Resolute Desk" while wearing a mask, so it's unclear how he's taking this news.

The photo of the first lady appears to show her wearing a surgical mask rather than the CDC-recommended "cloth face covering," the former of which is recommended only for use by health care professionals and medical first responders amid critical supply shortages.