The Atlantic underlines how passages from the emails demonstrate that Don Junior was lying in his previous accounts of that meeting.

In a June 3, 2016, email, Rob Goldstone, a music publicist and acquaintance of Trump Jr. wrote to him:

The Crown prosecutor met with [musician Emin Agalarov’s] father Aras this morning and in their meeting offered to provide the Trump campaign with some official documents and information that would incriminate Hillary and her dealings with Russia and would be very useful to your father.

This is obviously very high level and sensitive information but is part of Russia and its government’s support for Mr. Trump.

The final sentence is essential because it shows that Trump Jr. knew going into the meeting that the purpose was to receive information damaging to the Clinton campaign. Trump Jr. had previously denied that he knew what the meeting was going to be about before he entered it.

He’s been lying, you see. Lying and lying and lying. Not lying about sex in the president’s study, but lying about meeting with a representative of a hostile power to get information damaging to the rival candidate. He’s been lying his face off about that.

In a later email, dated June 7, Goldstone wrote to Trump Jr. that he wished to “schedule a meeting with you and The Russian government attorney who is flying over from Moscow.” That’s important because Trump Jr. previously claimed that he did not know that the woman, Natalia Veselnitskaya, was Kremlin connected.

Lying and lying and lying. He’s a big ol’ liar, as well as a bully.

Finally, the emails make clear that Jared Kushner, President Trump’s son-in-law and a White House senior adviser, and Paul Manafort, then Trump’s campaign chairman, were both copied in, meaning they too would have been aware of the purpose of the meeting and of Veselnitskaya’s identity. Kushner failed to disclose the June 9 meeting when applying for security clearance, but more recently did disclose it, as did Manafort. Both Kushner and Manafort are under investigation for business dealings and in relation to a broader investigation into the Trump campaign’s ties to Russia.

For being sleazy fucks, in short.

Trump Jr.’s decision to release the full emails, after previously lying about his discussions, is yet another watershed moment. It provides the most solid evidence yet that members of the Trump campaign’s inner orbit were ready and willing to collude with the Russian government, and it proves that the Trump campaign knew that the Kremlin supported Trump’s campaign against Hillary Clinton. (In mid-July, weeks after the meeting, Trump Jr. appeared on CNN, where he blasted the notion that Russia backed his father as “phony” and “disgusting.”)

Because he’s a lying liar who tells lies.