Ban politicians and family from trading individual stocks - instead allow them to purchase, or ensure a large part of their compensation package is in the form of stock units in, a USA index fund that is comprised of a large basket of USA based companies that benefit all American’s, as determined by the public.
American’s will also be allowed to invest in this fund such that the politicians are rewarded for driving growth in the USA above all else - thus aligning their incentives with the people they are elected to serve. ie their constituents, not those that are willing to collude with politicians to mutual financial benefit to the detriment of US citizens