Valley investor David Sacks will serve as President-elect Donald J. Trump’s new artificial intelligence (AI) and crypto czar, advising the White House on the two critical emergent technologies. Sacks was an early backer of Governor Ron DeSantis (R-FL) during the 2024 Republican presidential primary but later jumped ship as the campaign struggled, eventually backing Trump’s bid to retake the White House.A close ally of technology and space exploration mogul Elon Musk, Sacks, too, hails from South Africa. He was born in Cape Town before his parents emigrated to Tennessee. In 1999, Sacks—then a business consultant with McKinsey & Company—joined the...