What makes you think police chiefs support Obama and Black Lives Matter, who have incited violence against and caused more cops to be killed in the last 8 years than any time in recent history?
“caused more cops to be killed in the last 8 years than any time in recent history?”
According to the National Law Enforcement Officers Memorial Fund that’s not true. They have deaths by year going back to 1791.
http://www.nleomf.org/facts/officer-fatalities-data/year.html