Any number of surveys going back the last ~10 years. Forbes, PolitiFact, Open Secrets, etc. Here's a more recent forbes one: https://www.forbes.com/sites/cha

Any number of surveys going back the last ~10 years. Forbes, PolitiFact, Open Secrets, etc. Here's a more recent forbes one: https://www.forbes.com/sites/chasewithorn/2020/10/20/even-americas-billionaires-are-tilting-toward-biden-in-the-2020-presidential-race/?sh=7f951e382bb7 https://www.forbes.com/sites/chasewithorn/2020/10/20/even-am...