text: The murder rate went down over most of Obama's two terms, and only at the end did it spike. It must have been the legalization of weed in Colorado that fomented the upsurge of violence in Chicago. Or it was that they knew Obama was leaving and that Trump would probably win. You're welcome. 
  
  https://www.thetrace.org/2017/01/chicago-murder-rate-fatal-shootings/