Sort of, in that the unverified Russian intelligence to which he is referring seems to be anonymous, at least to us.
You can't verified an unverified report by pointing to information in that unverified report.
"You're literally only mad because I dismantled everything you stand for."
Mueller went through and verified many things about it in his report.
Like all good intelligence chiefs, Brennan likely provide some information that was unverified, as well as some that was verified. This bit may of been among it. It's still unverified information, and likely Russian propaganda.
Four of the first 5 links (one was behind a paywall. Some of them said there could have been illegal contributions, none of them said there were illegal contributions. A couple said what was legal is bad enough.
At the heart of the inquiry into the alleged collusion between Trump and Russia is money. It provides concrete evidence of relationships, methods, and motives.
www.americanprogress.org
Shell companies, pseudonyms, shady lawyers, and secrecy: The president’s and his lawyer's business practices match the classic pattern of suspicious activity.
www.wired.com
Donald Trump may not have any business in Russia, but Russia certainly has business in Donald Trump.
themoscowproject.org
It's even harder when the links don't exist. "You're literally only mad because I dismantled everything you stand for."
That's exactly what I searched for.