I know because my Great- Grandfather loved him. He founded an Ironworkers Union in NYC, and then helped form the Liberal Party in NYC. It was formed because Commies were trying to take over the Laubor Movement.
I have friends in the Ironworkers union-it has an excellent world-class apprentice program. Most of the blue collar union members and leaders were anti communist.
I understand that Harry Lundeberg, long time president of the Sailors Union of the Pacific was Dwight Eisenhower’s first choice to be Secretary of Labor. He was a militant concerning benefits and safety for his members but was also a very strong anti-communist.