A top House lawmaker’s confrontation with government researchers over a groundbreaking climate change study is provoking a national backlash from scientists, who say his campaign represents the most serious threat Congress has posed to scientific freedom. Rep. Lamar Smith (R-Tex.), chairman of the House Committee on Science, Space and Technology, has subpoenaed scientists at the National Oceanic and Atmospheric Administration and demanded that they turn over internal e-mails related to their research. Their findings contradicted earlier work showing that global warming had paused, and Smith, a climate change skeptic, has accused them of altering global temperature data and rushing to publish their research in the June issue of the journal Science. [ NOAA chief tells lawmaker: No one will ‘coerce the scientists who work for me’ ] So far, NOAA officials have resisted Smith’s demands, and the showdown has escalated. The lawmaker has threatened to subpoena Commerce Secretary Penny […]