A Sen. J.D. Vance-backed company exposed workers to “nightmare” conditions that saw ambulances rushing them to hospital with heat stroke symptoms frequently, a bombshell CNN report stated Tuesday. As a venture capitalist, Vance (R-OH) sunk $150,000 into the start-up App Harvest in Eastern Kentucky in 2017 and took a seat on the board of directors. But conditions at the indoor-agriculture company deteriorated soon after its opening, former workers described to the network. Last year, three years after it went public, App Harvest declared bankruptcy with hundreds of millions of dollars of debt. …