In legal terms, what Trump Jr. did with the information he knew about Russia, as reported by the New York Times, is a pretty clear intent.
“If he received an email in advance saying ‘This is coming from the Russian government,’ he’s certainly knowledgeable about where the information is coming from,” Jacobovitz said. “And he attempts to attend a meeting with the hope and intent to obtain inside dirt on Hillary Clinton. That would go a long way in trying to determine whether it’s conspiracy. … It’s not as if he walks into the meeting and he’s surprised by what he’s hearing.”
[Timeline of a story about Donald Trump Jr. and Russia that keeps getting worse]
Another piece of evidence to stack up in the “intent” column: Why were two of Trump’s top campaign aides also in the meeting? The Times reports that Trump’s then-campaign manager, Paul Manafort, and Trump’s son-in-law Jared Kushner came with Trump Jr. to meet with the Russian lawyer. It suggests that the Trump campaign put a very high premium on the meeting.