https://www.nytimes.com/2015/06/25/us/tally-of-attacks-in-us-challenges-perceptions-of-top-terror-threat.html fast forward http://www.reuters.com/article/us-usa-trump-extremists-program-exclusiv-idUSKBN15G5VOOn several occasions since President Obama took office, efforts by government agencies to conduct research on right-wing extremism have run into resistance from Republicans, who suspected an attempt to smear conservatives.
A 2009 report by the Department of Homeland Security, which warned that an ailing economy and the election of the first black president might prompt a violent reaction from white supremacists, was withdrawn in the face of conservative criticism. Its main author, Daryl Johnson, later accused the department of “gutting” its staffing for such research.