Congress overall performance vs the s&p 500

just curious if anyone has looked at the performance of all of congress trading/investing vs the s&p 500 performance over the same time period? obviously the pelosi’s and wasserman’s and trump’s have way outperformed during their time ”serving our country” but there will always be outliers no matter what, including underperformers. My question is, has the entirety of congress (each individual portfolio, or the summation of everyone’s portfolios) and our federal govt significantly outperformed the average retail investor (s&p 500 as a baseline). I imagine with all the focus on this topic, someone surely has, and if so can anyone point me in the direction of that study? thanks