Over the last 6 months we have seen a huge increase in the amount of violence, rioting and looting in major cities across the US. We believe this activity will continue even through the election. Many voters have been voting early regardless of party affiliation and OSINT news sources are reporting more and more violent acts (not tied to voting). One thing is certain, irregardless of the outcome of the election people will be upset with the results, and a delay in certification of the results may also have an effect on how people respond.
Jigsaw Security has been watching groups like the "Proud Boys" for quite awhile now. The example above (somewhat dated) shows connections between individuals as a result of a leak of sensitive video content that was processed by our intelligence system.