Some of Trump’s goons tore up signs held by protestors and bashed one of them in the head when the protestor tried to retrieve it.
The protestors were carrying some provocative signs on the sidewalk outside Trump headquarters, comparing him to the KKK and so forth. Not sure about the legality of trying to unclog the area on the sidewalk in front of a building. Seems like the obligation would be to call the police to do it.
Here’s a video report that includes the encounter. The reporter also notes that Trump left himself an out with his pledge to support the Republican nominee, saying he has no “intention” of changing his mind.