Summary: President George W. Bush presided over the weakest eight-year span for the U.S. economy in decades, according to an analysis of key data, with economists across the ideological spectrum increasingly viewing his two terms as a time of little progress on the nation’s thorniest fiscal challenges. Specifically, the number of jobs in the nation increased by about 2 percent during Bush’s tenure, the most tepid growth over any eight-year span since data collection began seven decades ago. Gross domestic product, a broad measure of economic output, grew at the slowest pace for a period of that length since the Truman administration. And Americans’ incomes grew more slowly than in any presidency since the 1960s, other than that of Bush’s father George H. W. Bush.