So they are looking at third parties who may have a tie with somebody tangentially related to the Trump campaign, while we know that Bill Clinton and JohnPodesta had direct financial ties....
The FBI may not find ties to Trump people, but they can plant some. I believe Trump. I believe he has no ties to Russia, has no contacts in Russia, has no reason to know anyone to talk to in Russia, and has no knowledge of anyone on his campaign who contacted Russia.
He seems to me, to be quite confident, probably because he knows there will be absolutely no evidence to the contrary. (Unless, it should be planted, of course.)
Anything is possible.