The exchange began after the man saw our story featured last night on the Rachel Maddow show on MSNBC. We reported that Kasowitz is not seeking a security clearance even though the Russia case involves a significant amount of classified material.
Experts said Kasowitz could have trouble getting a security clearance because of what multiple sources described as a recent history of alcohol abuse. Former employees also said Kasowitz had engaged in behavior that made them uncomfortable.
Since the story was published, his spokesman issued a statement disputing several parts of the story: "Marc Kasowitz has not struggled with alcoholism," 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."
The rigorous background investigation that goes into getting security clearance also considers "any information relevant to strength of character, honesty, discretion, sound judgment, [and] reliability."
The exchange of emails Wednesday began at 9:28 p.m. Eastern when the man sent the following message to Kasowitz's firm account.
You don't know me. I don't know you.
But, I believe it is in your interest and the long-term interest of your firm for you to resign from your position advising the President re. pending federal legal matters. No good can come from this and, in fact, your name may be turn out to be a disparaging historical footnote to the presidency of DJT.
Five minutes later, Kasowitz responded with two words:
Sent from my iPhone
Marc E. Kasowitz
Kasowitz Benson Torres LLP
Fifteen minutes after that, Kasowitz sent a second email:
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 f---ing with me now
Let's see who you are
Watch your back , bitch
The man responded politely:
Thank you for your kind reply.
I may be in touch as appropriate.
But Kasowitz continued to harangue him:
(Blacked out) call me. (Blacked out) if you want a conversation. I will have it with you. You are such a piece of s--t. Call me. Don't be afraid, you piece of s--t. Stand up. If you don't call, you're just afraid. Call me.
And then, just 33 minutes after the man's initial email, Kasowitz sent a fourth response, referring to his own Jewish heritage and the man's name, which he presumed to be Jewish.
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.
The man told us that the email exchange disturbed him so greatly he forwarded it to the FBI so there would be a written record in case Kasowitz followed through on the threat.
Experts in the laws on harassment and online threats differed on whether Kasowitz's emails could put him in legal jeopardy.
When considering whether words constitute a true threat versus protected speech, "the threat has to be credible and the person has to intend to make the victim fear imminent physical harm,'' said Danielle Citron, a University of Maryland law professor and author of a book on online harassment.
Citron pointed in particular to Kasowitz's statements: "I already know where you live" and "you will see me. I promise." She said: "That's incredibly troubling language. If I'm a prosecutor I'm going to think hard about that."
Ron Kuby, a New York lawyer who argued a case that overturned a portion of the state's harassment law on free speech grounds, said he believed Kasowitz had not violated the law with his missives.
"When Kasowitz says things like, 'I already know where you live,' he is inching closer to the line. But in my view — as someone who despises the Trump administration, but who has litigated these issues — he is well on the legal side of the line."
For over 15 years, Trump has periodically retained Kasowitz, who has cultivated a tough-guy image.
The New York Times reported this week that the relationship between Kasowitz and the Trump White House had soured and that Kasowitz could resign. Kasowitz's spokesman told ProPublica Wednesday: "The NYT story is not accurate." Kasowitz's firm was also sued for malpractice this week by a former client in a billing dispute.
Update, July 13, 2017: A spokesman for Marc Kasowitz sent ProPublica this statement:
"Mr. Kasowitz, who is tied up with client matters, said he intends to apologize to the writer of the email referenced in today's ProPublica story. While no excuse, the email came at the end of a very long day that at 10 p.m. was not yet over. 'The person sending that email is entitled to his opinion and I should not have responded in that inappropriate manner,' Mr. Kasowitz said. 'I intend to send him an email stating just that. This is one of those times where one wishes he could reverse the clock, but of course I can't.'"
Read the full ProPublica story here.