I wanted to mention something I have said before, The Russians hacked the DNC and the RNC and only released the DNC stuff or so I have heard, I think. If so why isn't blackmail the go to choice as to why Republicans are standing behind Trump rather than the country and the rule of law. Maybe they are willing to be traitors because they already are and one source would nail them while the other they have a chance of pulling off.
That has been one of the predominant issues with the Intelligence community and the Military all along, that were vehemently opposed to Trump from his campaign on. It's not so much that he is "colluding" (a term that tends to refer to a blanket of compromising issues involving his family and Russian oligarchs and Intelligence), but that Russia has so much dirt on him and his empire, that he is thoroughly compromised. He's not an active agent, but a "retarded agent," as he is officially referred to by the CIA.
This is what Hillary referred to when she called him a puppet. He pretty much has lost control of the ability enact policy against Putin, because Putin controls his finances and very likely his freedom. When you consider how boldly and unapologetically he acts to defend Putin at all costs, and ignore all US policy to sanction their proven and well-known meddling in our elections, it really lends no open question as to what is going on. Trump believes that what Putin has on him, and can do to him, is in fact
worse than what could happen to him when he acts in defiance of US policy and against our national security interests.