The American "militia" movement is far less organized than the American New Left. Soros funds armies of professional agitators who are shipped around the country to smash stuff for news cameras, presumably to give the illusion that the New Left is far more powerful and influential than it actually is.
There is simply no such structure on the Right, the Koch family does not fund or organize any right wing paramilitaries or professional protesters. There is no central command in the militias, there are a zillion really tiny (a couple dozen guys) groups in the backwoods who basically play army with ancient surplus camo and crappy Bushmaster rifles in the woods a couple weekends every few months, but who aren't connected to each other. Even the most recognizable groups like the Three Percenters don't really have a central command. If Hillary won you'd probably see some localized rebellions along the lines of the Malheur occupation, but they would fizzle out quickly.
With Trump winning Soros's Plan B is to terrorize Trump's base by wreaking havoc. Soros wants to demoralize Trump's supporters by destroying everything, in fact such ideas have been around for a while, Glenn Back mentioned once that he'd read an underground manual used by anarchists to plan a national revolution, and the basic gist of it was to destroy everything so that the people would have "nothing to lose but their chains" and would thus join the revolutionaries.
Churches would be destroyed so as to eliminate religious faith as a solace. Businesses would be trashed and looted so people would have no way to feed themselves. Then residential neighborhoods would be burned so people would be, in the end, homeless and starving. Then, with no other options, the masses would accept their new masters. It's sort of Alinsky on steroids, the end point of the Leninist idea that anybody with any ambition or wealth should be destroyed and their wealth redistributed. It's purely destructive and has nothing to offer except chaos for the sake of chaos. Destruction of the old system is an end to itself with no thought as to what will come after.