President Trump's personal attorney reportedly threatened someone through email

President Trump's personal attorney in the Russia investigation threatened someone through his email Wednesday night.

ProPublica did a story on Trump lawyer Marc Kasowitz.

The story, which reported that Kasowitz was not seeking a security clearance despite the investigation involving a lot of classified information aired on MSNBC's "The Rachel Maddow Show."

Experts said Kasowitz could have trouble getting that clearance because of a recent history with alcohol abuse. His spokesman said several parts of the story were not true.

See reactions of the emails:

After seeing the report on MSNBC, a man sent an email to Kasowitz with the subject line, Resign Now."

Kasowitz sent a series of profanity laced emails to the man including one that said, "I'm on you now. You are f'ing with me now. Let's see you are. Watch your back."

And this one, "I already know where you live, I'm on you. You might as well call me. You will see me. I promise."

The New York Times reported this week that the relationship between the Trump White House and Kasowitz has been strained and he could resign.