They did it on purpose to damage Trump.
Look forward to the them doing it again in 2020.
Agreed. I don't believe that was a mistake any more than I believe the directors of the CIA and FBI made a mistake when the followed absurd allegations of "collusion" with Russia for three years. The Deep State is fighting back against the duly-elected President of the United States. They think their elitist jobs matter more than the will of the American people. At least with the Fed, this is just a destructive abuse of power, rather than full-fledged treason in in attempted coup.
But who appointed the head of the Fed? Why did Trump pick a swamp guy?