The Biden administration announced Tuesday it is loaning $6.6 billion to an electric-vehicle maker facing accusations of defrauding investors. The Department of Energy’s Loan Program Office is awarding $6.6 billion to a subsidiary of Rivian Automotive to construct Project Horizon, an electric-vehicle factory in Georgia east of Atlanta. Rivian previously paused construction of the $5 billion Georgia facility earlier this year to cut costs and speed up production. “This...