(FILES) David Sacks, CEO of Yammer, speaks during the first day of the 2024 Republican National Convention at the Fiserv Forum in Milwaukee, Wisconsin, July 15, 2024. US President-elect Donald Trump announced in a statement on December 5, 2024 that David Sacks will be the “White House A.I. & Crypto Czar.” (Photo by ANDREW CABALLERO-REYNOLDS / AFP)