The tiff escalated quickly.

On Sunday, President Trump took to Twitter to tout his achievements on criminal justice reform.

“When all of the people pushing so hard for Criminal Justice Reform were unable to come even close to getting it done, they came to me as a group and asked for my help. I got it done with a group of Senators & others who would never have gone for it,” Trump tweeted.

When all of the people pushing so hard for Criminal Justice Reform were unable to come even close to getting it done, they came to me as a group and asked for my help. I got it done with a group of Senators & others who would never have gone for it. Obama couldn’t come close…. — Donald J. Trump (@realDonaldTrump) September 9, 2019

TRENDING: BREAKING REPORT: President Trump to Nominate Amy Coney Barrett to Replace Ginsburg on the Supreme Court

“Obama couldn’t come close,” Trump continued. “A man named @VanJones68, and many others, were profusely grateful (at that time!). I SIGNED IT INTO LAW, no one else did, & Republicans deserve much credit. But now that it is passed, people that had virtually nothing to do with it are taking the praise,” he wrote.

Then he went on the attack.

“Guys like boring musician @johnlegend, and his filthy mouthed wife, are talking now about how great it is – but I didn’t see them around when we needed help getting it passed. ‘Anchor’ @LesterHoltNBC doesn’t even bring up the subject of President Trump or the Republicans when talking about the importance or passage of Criminal Justice Reform,” Trump wrote. “They only talk about the minor players, or people that had nothing to do with it…And the people that so desperately sought my help when everyone else had failed, all they talk about now is Impeaching President Trump!”

….A man named @VanJones68, and many others, were profusely grateful (at that time!). I SIGNED IT INTO LAW, no one else did, & Republicans deserve much credit. But now that it is passed, people that had virtually nothing to do with it are taking the praise. Guys like boring….. — Donald J. Trump (@realDonaldTrump) September 9, 2019

….musician @johnlegend, and his filthy mouthed wife, are talking now about how great it is – but I didn’t see them around when we needed help getting it passed. “Anchor”@LesterHoltNBC doesn’t even bring up the subject of President Trump or the Republicans when talking about…. — Donald J. Trump (@realDonaldTrump) September 9, 2019

….musician @johnlegend, and his filthy mouthed wife, are talking now about how great it is – but I didn’t see them around when we needed help getting it passed. “Anchor”@LesterHoltNBC doesn’t even bring up the subject of President Trump or the Republicans when talking about…. — Donald J. Trump (@realDonaldTrump) September 9, 2019

Legend’s wife, former model Chrissy Teigen, was apparently miffed that Trump hadn’t mentioned her by name.

“lol what a pussy ass bitch. tagged everyone but me. an honor, mister president,” she wrote.

lol what a pussy ass bitch. tagged everyone but me. an honor, mister president. — christine teigen (@chrissyteigen) September 9, 2019

Legend also responded to Trump’s tweets by appealing to the first lady.

“Imagine being president of a whole country and spending your Sunday night hate-watching MSNBC hoping somebody—ANYBODY—will praise you. Melania, please praise this man. He needs you,” he tweeted. A minute later he wrote, “Your country needs you, Melania.”