America’s economy will grow twice as fast compared to earlier forecasts, a new report predicts, resting its optimistic outlook on the huge dose of fiscal stimulus and accelerating vaccine rollout. “The significant fiscal stimulus in the United States, along with faster vaccination, could boost U.S. GDP growth by over three percentage points this year, with welcome demand spillovers in key trading partners,” the Organization for Economic Cooperation and Development (OECD) wrote in its so-called interim March report, released Tuesday (pdf). The OECD’s closely-watched December report, one of two main economic outlook products bridged by Tuesday’s interim projections, predicted that America’s economy would grow by 3.2 percent. Tuesday’s interim report raises estimates for U.S. economic output this year to 6.5 percent. “Sizable risks remain,” the report cautions, however, chiefly slow progress in vaccine rollout and the emergence of new vaccine-resistant mutations of the CCP (Chinese Communist Party) virus, the novel coronavirus that causes …