 A new report raises concerns that much of the data produced by the U.S. Census Bureau and other federal agencies is at risk of becoming tainted by political interference. Here's NPR's Hansi Lo Wong. Data from the federal government tells the country not only how many people are living in the U.S., but also, for example, how many kids have high lead levels in their blood and how many have been lagging in math and reading since the start of the pandemic.