https://www.theatlantic.com/amp/article/545738/
"According to a source familiar with the congressional investigations into Russian interference with the 2016 campaign, who requested anonymity because the investigation is ongoing, on the same day that Trump Jr. received the first message from WikiLeaks, he emailed other senior officials with the Trump campaign, including Steve Bannon, Kellyanne Conway, Brad Parscale, and Trump son-in-law Jared Kushner, telling them WikiLeaks had made contact. Kushner then forwarded the email to campaign communications staffer Hope Hicks. At no point during the 10-month correspondence does Trump Jr. rebuff WikiLeaks, which had published stolen documents and was already observed to be releasing information that benefited Russian interests."
Furthermore,
"WikiLeaks went on. “Btw we just released Podesta Emails Part 4.”
Trump Jr. did not respond to this message. But just 15 minutes after it was sent, as The Wall Street Journal’s Byron Tau pointed out, Donald Trump himself tweeted, “Very little pick-up by the dishonest media of incredible information provided by WikiLeaks. So dishonest! Rigged system!”"
Finally,
"WikiLeaks made a series of increasingly bold requests...requesting that the president-elect tell Australia to appoint Julian Assange ambassador to the United States."
Trying to commit espionage(I think), over twitter DM's...
I'm sure Mueller will/has already looked into this.