According to an article in The Atlantic, Trump, Jr., also sent an e-mail informing other people on the campaign—including Steve Bannon, Kellyanne Conway, and Jared Kushner—about this contact.

All this raises serious questions about Trump, Jr.,’s actions. Foreign nationals are barred, by law, from interfering in a U.S. election by contributing something “of value” to a campaign. Any U.S. citizen who assists the perpetrator of such an action may be guilty of conspiracy, which, unlike the vaguely defined term “collusion,” is certainly a crime.

In short, Trump, Jr.,’s campaign activities have created a real problem for him and his father, and a public-relations disaster for the White House. Even though Roger Stone, a longtime Trump ally, boasted during the campaign about communicating with Julian Assange, and Trump himself repeatedly touted the hacked D.N.C. and Podesta e-mails—saying, on one occasion, “I love WikiLeaks”—the Trump camp has consistently and vehemently denied that it had any ties to the organization.

The Secret Correspondence Between Donald Trump Jr. and WikiLeaks - The Atlantic