In his final address, President Biden warned about the concentrated power of the ultra-wealthy in America, expressing concerns over its threat to democracy.

Billionaires at the Capitol on Monday included Tesla founder and CEO Elon Musk, Amazon founder Jeff Bezos, Meta CEO Mark Zuckerberg, former presidential candidate Vivek Ramaswamy, OpenAI CEO Sam Altman, billionaire Trump supporter Miriam Adelson, media mogul Rupert Murdoch and others.

The guest list includes some of America’s most influential tech billionaires and politicians as well as some foreign leaders and celebrities who have embraced Trump.