Former Vice President Joe Biden slammed President Donald Trump as an “absolute fool” for having appeared to make fun of him wearing a mask on Memorial Day.

“He’s a fool, an absolute fool to talk that way. Every leading doc in the world is saying you should wear a mask when you’re in a crowd, and especially when you know you’re going to be in a position where you’re going to inadvertently get closer than 12 feet to somebody,” Biden told CNN’s “Situation Room” on Tuesday, May 26.

“But it’s just absolutely—his macho stuff, for a guy—I shouldn’t get going, but it’s cost people lives. It’s costing people’s lives,” he added. “It’s stocking deaths.”

Biden said that wearing a mask presents leadership, saying, “Presidents are supposed to lead, not engage in folly and be falsely masculine.”

Biden made his first public appearance on Monday after more than two months of self-isolation amid the CCP Virus (coronavirus) pandemic. Biden, wearing a black face mask, accompanied by his wife, participated in a wreath-laying ceremony at a local veteran’s memorial near his Delaware home.

After the event, President Trump retweeted a post by a political commentator that featured an image of Biden wearing a mask with comment, “This might help explain why Trump doesn’t like to wear a mask in public.”

During a press conference at the White House on Tuesday, President Trump said he did not criticize Biden.

“Biden can wear a mask. But he was standing outside with his wife, perfect conditions, perfect weather,” Trump said. “They’re inside, they don’t wear masks and so I thought it was very unusual that he had one on. But I thought that was fine. I wasn’t criticizing him at all. Why would I ever do a thing like that?”

However, during the weeks that President Trump has held daily briefings on the CCP Virus at the White House, even the weekends he did mock the vice president who quarantined himself in his basement, trying to do media interviews as well as fundraise and campaign online.

“I’d love to see him get out of the basement so he can speak, because you know he’s locked in a basement somewhere and every time he talks it’s a good thing,” President Trump said, implying Biden’s history of gaffes and misstatements. “I just don’t understand why he’s not … well, I do understand they don’t want him to come out.”

The president’s son, Donald Trump Jr. also criticized Biden for sheltering in his basement to hide from Tara Reade, a former staffer who accused Biden of sexual assault during his time in his Senate office.