The pandemic was surely responsible for the high volatility in the market this year and the Presidency has little to do with it this time. It is difficult to say what the future will bring but if the pandemic continues, we might see some more of it.
The biggest NQ monthly range was in Mar 2020 at 2400 points. It is during Trump era. This is excellent for day traders. The smallest NQ monthly range was around 2004-2006 at around 100 points. That was during George Bush era. That was bad for day traders. Biden will probably not hit > 2400 points monthly range.