As president of the United Mine Workers, Richard Trumpka led the striking miners into multiple acts of terrorism against the company and the people of Southwest Virginia
When Trumpka was elected UMWA president he immediately hired back into the top union leadership circle cronies & cohorts of Tony Boyle. Tony Boyle had his predecessor UMWA president killed - Joe “Jock” Yablonski.
https://en.wikipedia.org/wiki/W._A._Boyle
https://en.wikipedia.org/wiki/Joseph_Yablonski
That should tell you all you need to know about Trumpka.