"Climate data from NASA and the National Oceanic and Atmospheric Administration have been politically vulnerable. When Tom Karl, director of the National Centers for Environmental Information, and his colleagues published a study in 2015 seeking to challenge the idea that there had been a global warming "slowdown" or "pause" during the 2000s, they relied, in significant part, on updates to NOAA's ocean temperature data set, saying the data "do not support the notion of a global warming 'hiatus.'" In response, the U.S. House Science, Space and Technology Committee chair, Rep. Lamar S. Smith (R-Tex.), tried to subpoena the scientists and their records."
Keith's note: Lamar Smith's policy director throughout this period of subpoenas was Chris Shank who currently leads the Trump Transition Team effort at NASA.