ANTIFA is not the only organization, which can cause some havoc. We also have BLM, then I would have an eye on "Sunrise", They have a lot of more wackos to be mobilized. These young uneducated - or should I say, wrong educated? - kids can easily be motivated for every crap. They don't think. They don't analyze. All these social media can do great damage by playing emotions. And all these organizations have shit loads of money because (not only) rich people donate like crazy. We should not underestimated the forces against the President.  And Trump is already most of the time on AF1 - another reason he is doing so many "protest assemblies" at the airports. Short notice, fast moving, Unpredictable. Smart guy.