There are swirling rumors about congressional investigations into Russian interference in the 2016 elections and ties to the Trump campaign. Conservative Republicans like having control of all three branches of government but THEY DO NO LIKE having Russians in the cupboard. This could be the issue that brings Trump down.
But really, I have to wonder what result the Russians are looking for. Sure, they want the sanctions lifted, and they want to be able to annex former Soviet colonies at will. The oligarchs that run things in Russia are rich and powerful, and want to be able to drill and mine wherever they want, to get richer off the public lands. They will partner with Trump to build pipelines and strip mines all over the world (including the US) with the profits going to Russia.
Politically? I don't think our democracy is being threatened. I think it's all about money, just like Trump is all about money but is a political naïf.
I think conservatives who worry about Russian interference have the wrong end of he stick. Russian oligarchs don't care about ideology or political system, except to keep them out of the way of raping the land for maximum profit.