Softbank CEO Masayoshi Son announced a $100 billion investment in the U.S. over the next four years during a Monday visit to President-elect Donald Trump's residence Mar-a-Lago in Palm Beach, Florida.The billionaire investor and founder of the Japanese tech-investing firm promised in the joint announcement with Trump to create 100,000 jobs at a minimum focused on artificial intelligence and related infrastructure. The money will be deployed before the end of Trump's term."My confidence level to ...