President Biden delivered a primetime farewell address, concluding his five-decade political career. WASHINGTON—President Biden said Wednesday that an oligarchy and a tech industrial complex were taking hold in America, warning of the risks of unchecked power in a farewell address that served as a bittersweet coda to his 50-year political career. Biden, in a 17-minute Oval Office speech that included a few stumbles, highlighted his work to usher the country out of the coronavirus pandemic and investing in infrastructure and technology.