U.S. President Donald Trump applauds at the "Winning the AI Race" Summit in Washington D.C., U.S., July 23, 2025. REUTERS/Kent Nishimura/File Photo Purchase Licensing Rights, opens new tabCompaniesWASHINGTON, Dec 11 (Reuters) - U.S. President Donald Trump on Thursday signed an executive order on artificial intelligence that will attempt to preempt a growing number of state laws governing the technology with a national standard."We want to have one central source of approval," Trump told reporter...