From what I can piece together, the money trail between Trump and the Russians is where you really want to look. Based on what I have been reading, I do think that the Trumps needed access to money, and they got it from the Russians. Any time money is involved, it leads to other things, like pay back, that sort of stuff.
Even if there doesn't appear to be collusion in regards to the elections, it seems pretty obvious that the Trumps want to maintain very close relationship with the Russians for personal gain, and had it been any other president, the Russians would be under very close scrutiny.
If Russia is or ever will be a threat to the US, or to the rest of the world, Trump cannot be counted upon to do the right thing because of his financial involvement with them. This creates a huge conflict of interest which the president should never have. It appears that he does more to protect Russia than to protect the US because it serves his financial interests.