Cattle futures, whitewater land deals, commodity trading. Friends do pump and dump for them or they invest in groups and get allocated a larger share of the net assets values. Publishers advance them money for crappy books they did not write and “friend (some from nefarious agencies) buy them. Speaking fees for showing up and saying nothing. Brokering lucrative contracts in places like Haiti, Ukraine, the Middle East. Uranium deals. The list goes on.
The Senate under Leahy could try to do a quick vote if it might backfire as suggested and end it without embarrassment.
I am old enough to remember when that scandal broke. That is how I recall the scam.