We do have freedom of assembly and freedom of speech, so far. Rather than Trump reigning in such groups, it would be more likely democrats would someday do more to those on the right hand, as they are very intolerant of freedoms. Clinton gave serious intentions about shutting down right wing web sites, etc. when she was running for POTUS, mostly because they threaten the LEFT. And democrats keep on talking up the dangers of white nationalist 'hate' groups as a great threat while completely ignoring that most of the rioting and dangerous groups are on the LEFT.
I hope Americans can see the absurdity of the LEFT, how their policies are wrecking the country and not support them with their votes. The only way to squash their revolution is to vote the LEFT out of power.