Who are America's richest people supporting in US Presidential elections?

Elon Musk is supporting Republican presidential nominee Donald Trump, whereas Walmart heiress Christy Walton is backing Democratic nominee Kamala Harris. Mark Zuckerberg hasn't endorsed anyone, but said Trump's response to assassination attempt was "badass". Bill Gates reportedly donated $50 million to non-profit backing Harris. Jeff Bezos, Warren Buffett and Steve Ballmer haven't endorsed anyone.