While the Trump family struggles to navigate Donnygate, the president’s personal lawyer on all things Russia, Marc E. Kasowitz, has come under scrutiny of his own after sending a stranger a string of threatening, expletive-laden e-mails on Wednesday night. “I’m on you now. You are fucking with me now Let’s see who you are Watch your back, bitch,” he wrote in one. And in another: “I already know where you live.”

The entire stunning tirade was reported by ProPublica on Thursday. The flurry of messages, which were sent between 9 p.m. and 10 p.m. Eastern the night before, was prompted by an e-mail from an individual living in the United States that called on Kasowitz to resign from his post as the president’s personal lawyer. “I believe it is in your best interest and the long-term interest of your firm for you to resign from your position advising the President re. pending federal legal matters,” the inciting e-mail read. “No good can come of this and, in fact, your name may be [sic] turn out to be a disparaging historical footnote to the presidency of DJT.”

The individual, who requested to remain unidentified, sent the e-mail to Kasowitz shortly after MSNBC’s Rachel Maddow Show aired a segment on a separate ProPublica investigation published earlier on Wednesday that said Kasowitz does not have and is not seeking a security clearance for his role representing Trump. The report also cited accounts from multiple sources suggesting that a recent history of alcohol abuse might make it difficult for him to obtain it. (In a statement to ProPublica, a spokesperson for Kasowitz denied the report. “Marc Kasowitz has not struggled with alcoholism,” Michael Sitrick wrote. “He has not come into the office intoxicated, attorneys have not had to go across the street to the restaurant during the workday to consult Kasowitz on work matters.” Sitrick did not respond to ProPublica’s request for comment about the e-mail exchange.)

Initially, Kasowitz responded, “F*ck you,” to the original e-mail. After 15 minutes with no response, the lawyer followed up:

And you don’t know me, but I will know you

How dare you send me an email like that

I’m on you now. You are fucking with me now

Let’s see who you are

Watch your back , bitch

The man, who reportedly lives in the Western U.S., then responded, “Thank you for your kind reply. I may be in touch as appropriate.” But this only seemed to further enrage Kasowitz, who continued, “I will have it with you. You are such a piece of shit. Call me. Don’t be afraid, you piece of shit. Stand up. If you don’t call, you’re just afraid. Call me.”

But Kasowitz, it seems, was not yet finished with his rant. “I’m Jewish. I presume you are too. Stop being afraid. Call me. Or give me your number and I will call you. I already know where you live, I’m on you. You might as well call me. You will see me. I promise. Bro.”

It is unclear whether Kasowitz could face any legal ramifications for his threatening e-mails, though the other individual involved did inform ProPublica that he reported the exchange to the F.B.I.

Kasowitz isn’t the only Trump attorney with a history of lashing out at critics. When asked to comment on a since-retracted rape allegation Ivana Trump reportedly made during her divorce proceedings with Trump, Michael Cohen—then in his role as special counsel for the Trump Organization—responded by exploding at The Daily Beast:

“I will make sure that you and I meet one day while we’re in the courthouse. And I will take you for every penny you still don’t have. And I will come after your Daily Beast and everybody else that you possibly know,” Cohen said. “So I’m warning you, tread very fucking lightly, because what I’m going to do to you is going to be fucking disgusting. You understand me?”