The American Community Survey provides information that helps local governments and businesses in everything from assessing health needs to locating Target stores. But now the Republican-led Congress has determined that it's an expensive violation of privacy. Will the Senate go along? Catherine Rampell says, "The American Community Survey may be the most important government function you've never heard of, and it's in trouble." She founded the Economix blog at the New York Times, where she's a reporter.