Biden delivered his farewell address on Wednesday.Alex Wong/Getty ImagesBiden delivered his farewell address to the nation on Wednesday, days before he leaves office.Biden warned of an oligarchy taking shape in the US and a "tech industrial complex."He also said AI posed opportunities and risks and that the US must lead the way over China.President Joe Biden delivered stark warnings for the American people during his farewell address to the nation Wednesday night, capping a 50-year career in politics less than a week before his one-term presidency comes to an end.Biden highlighted some accomplishments of his term, including the passage of major climate legislation and a gun-safety law.