Why the EV factory boom in the U.S. south is suddenly in trouble

Automakers, battery makers and suppliers have been directing billions of dollars to factories and other facilities across the United States - mostly in Republican districts, especially in the South. But EV sales forecasts are dropping, and federal support has dried up. Automakers are pivoting away from EVs and toward hybrid and gas vehicles. They are writing down assets and, in many cases, laying off workers. CNBC visited two southern industry towns to see what the future holds.