Leaked memos say that the troll has been feeding Putin intelligence for 8 years, partly because he is being blackmailed, and that his lawyer helped arrange the cracking of Democratic Party sites.
That lawyer says the memos are phony.
I have insufficient basis to reach a conclusion, but the idea of
blackmailing the troll by threatening to show that he had sex with
prostitutes in a bed Obama had slept in seems implausible to me. I'd
expect the troll to crow about that as if it were some sort of victory
for him.
More analysis of the credibility of this report.