People act like the pervasiveness of insider trading in Congress is an indisputable fact, when there have been only a few trades with suspicious timing, which is similar to what you would expect statistically from 535 wealthier people trading with no insider information. The only case where I feel like insider trading is likely was Richard Burr's sales before COVID.
Congress (plausibly) beats the market: https://www.ft.com/content/14339d5b-5a5f-4e4a-8293-ff3a2e25d...
Pelosi has made many suspicious trades: https://insider-trading.org/the-nancy-pelosi-insider-trading...
Suspicious trades before Trump's Iran announcements: https://www.bbc.com/news/articles/cge0grppe3po