It's interesting to watch familiar old names of ours surface in America's Trumpgate.
The media have uncovered that Trump's son was offered kompromat (damaging material) on Hillary Clinton from Russia's prosecutor general.
I think this is highly plausible. And I have no doubt that the Chaika-Agalarov connection could have been used by Putin (or the security services) to make contact with Trump and pass information to him through a trusted channel.
The facts we know:
Prosecutor General Chaika is a thief and a gangster.
Agalarov is a shady character and a major state contractor—one of the very few who fiercely and publicly stood up for Chaika in the first days of our campaign against him. Back when absolutely everyone was steering clear of Chaika.
So the extremely close—and most likely corrupt—ties between Agalarov and Chaika are plain to see.
Trump had fairly close ties both to the elder Agalarov and to his son:
They were planning to build a Trump Tower in Moscow and jointly organized a beauty pageant here.
Prosecutor General Chaika is so deeply entangled in corruption, so thoroughly compromised, and such a servile Putin lackey that both he and his office could easily have been used to get Trump's attention, foist some documents on him, and draw him into various cooperation schemes. Which, apparently, is what happened.
In any case, the chain of information transfer—Putin, Chaika, Agalarov, Trump—looks entirely plausible; nothing here feels far-fetched.