I was away last week, so I'm only now going back through the Senate Intelligence Committee's final report on Russia and the Trump campaign. It really is a stunning document.
https://www.intelligence.senate.gov/sites/default/files/documents/report_volume5.pdf

The committee found that Trump's campaign manager had a "close and lasting relationship" with a Russian intelligence officer who might have been tied to the unit involved in hacking Democratic political organizations in the U.S., during the 2016 campaign.

It found that Trump's campaign manager "on numerous occasions ... sought to secretly share internal Campaign information" with the Russian intelligence officer he had befriended, while he was running Trump's campaign.

It therefore concluded that Trump's campaign manager posed a "grave counterintelligence threat."

It found that one of President Trump's sons took a meeting in 2016 with two people with "significant connections to the Russian government, including the Russian intelligence services" to "receive derogatory information that would be of benefit to the Campaign."

It found that a campaign aide, @GeorgePapa19, likely learned about the Russian government's hacking campaign months before the information became public. (And it's super-skeptical of his claim that he told two foreign governments but not the Trump campaign.)

It found that Trump's campaign "sought to maximize the impact" of leaks of documents stolen from Democrats by Russian intelligence despite having a pretty clear idea that it was a foreign intel op. The campaign sought advance notice of the releases and "encouraged further leaks."

It found that when a tape was about to surface showing Trump boasting about sexual assault, his advisers leaned on WikiLeaks to release emails stolen from Hillary Clinton's campaign by Russian intelligence to divert public attention. WikiLeaks started doing so 23 minutes later.

There's more. But the bipartisan report is an impressive fact-finding enterprise and maybe the most complete accounting yet of the Trump campaign's interactions with Russia. It's worth your time: https://www.intelligence.senate.gov/sites/default/files/documents/report_volume5.pdf