As the below chart plainly shows, unemployment rates were already low and trending downward well before Trump was elected and assumed office. No thanks to Trump. Duh. 

Colorado Unemployment History
Date	National Unemployment Rate	Colorado Unemployment Rate
December 2016	4.7%	                3.0%
November 2016	4.6%	                3.0%
October 2016	4.8%	                3.1%
September 2016	4.9%	                3.2%

http://www.deptofnumbers.com/unemployment/colorado/