Donald Trump Jr.Don TrumpNoem to get fundraiser at Mar-a-Lago hosted by Donald Trump Jr. Company appeals rejection of controversial Pebble Mine  Singer Taylor Dayne responds to criticism after Mar-a-Lago performance: 'I try to stay non-political' MORE on Monday mocked Michael Avenatti following the news that the lawyer had been arrested and charged with wire fraud and extortion.

“Good news for my friend [Michael Avenatti],” President TrumpDonald TrumpRomney: 'Pretty sure' Trump would win 2024 GOP nomination if he ran for president Pence huddles with senior members of Republican Study Committee Trump says 'no doubt' Tiger Woods will be back after accident MORE's eldest son tweeted. “If you plead fast enough, you might just get to share a cell with Michael CohenMichael Dean CohenThe Memo: Trump faces deepening legal troubles Trump lashes out after Supreme Court decision on his financial records Supreme Court declines to shield Trump's tax returns from Manhattan DA MORE!”

Trump Jr. also included the hashtag #basta, meaning “enough” or "stop" in Italian, which Avenatti has repeatedly used to promote his legal actions against President Trump.

Avenatti is best known for formerly representing adult-film star Stormy Daniels in a number of lawsuits against President Trump and Cohen, the president's ex-personal lawyer.

In another tweet, the president’s son added: “#MAGA — Michael Avenatti Getting Arrested!!!”

Avenatti was charged Monday with extortion by federal prosecutors in Los Angeles.

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According to court documents, Avenatti is accused of threatening to expose damaging information about Nike unless the company paid millions to him and a client.

The charges come after Avenatti announced a press conference about alleged “criminal conduct” by Nike.

Cohen is headed to prison in May after pleading guilty to a number of financial crimes committed while he worked for the president, as well as lying to Congress.

Trump Jr. tweeted several more times at Avenatti, and resurfaced some of the lawyer’s old comments targeting him.

“Donald Trump Jr. will be indicted before his birthday on 12-31-18,” Avenatti tweeted in October. “If you doubt my prediction, please check my record over the last 7 months. #Winning.”

Trump Jr. responded to that tweet on Monday: “How'd that work out for you buddy?”

--This report was updated at 3:07 p.m.