President Trump is slated to speak on Tuesday in Washington at an event that he has billed as an "extraordinary gathering of America's greatest leaders, builders, innovators, and citizens," according to invitation materials obtained by CBS News. The event will showcase the "people, ideas and innovations building America's Golden Age," according to the invitation materials, which said that Mr. Trump will deliver "an address to the nation."The invitation touted special guests that include SpaceX CEO Elon Musk, Nvidia CEO Jensen Huang, Anthropic co-founder Tom Brown and Palantir Chief Technology Officer Shyam Sankar, among others. Several Trump administration officials are also named, including…