States could have policies to nationalize any company that develops smarter-than-human AI. This could be either in whole or in part, and with or without compensation. The level of compensation would act as a deterrent or stimulant to the development of smarter-than-human AI. Such policies could be enacted either before the fact and act as a deterrent, or after the fact to preserve state power. Whether nationalization would improve the situation for the rest of the world isn't clear.
The U.S. has a long history of nationalizing industries when its economic or strategic interests are threatened. Typically such nationalizations have only lasted as long as the threat persisted. A situation where the threat was indefinitely ongoing hasn't existed before. Past nationalized companies and industries have included General Motors, Montgomery Ward, Smith & Wesson, steel mills, coal mines, railroads, and banks.