You're right Soros has his hands all over our last few elections. I wonder who else does as well.
I'm not so sure anyone else does, with the exception of a few other billionaires.
Imagine covering both sides, and using one against the other to advance, in increments, an agenda the people would never swallow in one lump. That sure looks like what has happened in my lifetime, with one side advancing (with acclaim!) a few totalitarian enactments and then the other side gets a shot, back and forth.
The end result has been the consolidation of Federal power with a scope which would not have been accepted had the 'other side' done it. Emergency legislation or power granted (or usurped) in the heat of the moment has only added to the loss of Rights and Liberty enjoyed at one time by Americans.