Now it's time for Donald Trump to worry about emails.

Back in 2016, Donald Trump Jr., the president's son, met with a Russian lawyer with ties to the Kremlin.

On Monday, the New York Times reported that the man who brokered the meeting, Rob Goldstone, stated in an email to Trump Jr. that the lawyer had information that could hurt the Hillary Clinton campaign and explicitly stated that the information came from the Russian government, who was trying to help Trump win the election.

Why is this bad for Donald Trump? Well, it's a sign that members of his campaign welcomed support from Russia. (Jared Kushner and Paul J. Manafort, then the chairman of the Trump campaign, also attended the meeting.)

As everyone tried to process the report Monday night, Twitter did what it does best: make jokes.

Gmail nails it again pic.twitter.com/JdpF48QOVq — Jason O. Gilbert (@gilbertjasono) July 11, 2017

TO: donjr@trump.org

FROM: spy@russia.ru

SUBJECT: Fwd: E-vite to Treason



Hello, Mr. Junior. Am Russian from. Have serious information good — Mark Agee (@MarkAgee) July 11, 2017

tomorrow we're going to find out the email came from collude@russia.com — Dave Itzkoff (@ditzkoff) July 11, 2017

This could be the biggest email mistake in the last 18 months of email mistakes https://t.co/iqxOf5hy3J — Nate Cohn (@Nate_Cohn) July 11, 2017

Who among us hasn’t knowingly met with a hostile power because they promised to help elect your dad? https://t.co/23hse83cew pic.twitter.com/MweA5eyzrz — Matt O'Brien (@ObsoleteDogma) July 11, 2017

Never write if you can speak; never speak if you can nod; never nod if you can wink. And never, ever, e-mail. https://t.co/YiSYbvvRS2 — Neil Irwin (@Neil_Irwin) July 11, 2017

If this comes down to email it proves God is real and he uses karma to make his points pic.twitter.com/x9tT49ZPVI — Oliver Willis (@owillis) July 11, 2017

"but we're still voting for his entire agenda, right?" pic.twitter.com/UEJrHBasFg — sean. (@SeanMcElwee) July 11, 2017

Looks like Junior has some explaining to do.