If historical data is available, an aggregated result of this could be compared to the S&P index. To see if their trades actually outperform and therefore if they a better traders than average, and if so, this might mean they have better info.
https://projects.iq.harvard.edu/files/gov2126/files/ziobrows...
Jeez man, I can't even get a 1% raise, despite being a good worker in my team. 2M guaranteed, regardless of performance? What a sweet deal...
I'd love to see someone diagram how that is meant to be sinister.
https://www.thedailybeast.com/how-visa-courted-nancy-pelosi-...
Joking aside, I'm surprised that members of Congress have even allowed to trade on the markets, given how much inside information they know.
The whole problem with this approach though is that a smart senate inside trader (since the STOCK act) would not do these trades him/herself. They would trade inside tips to outsiders for favors instead.