Which was that the second stereotype used against labor in the United States, is that they are in some way tainted by organized crime.

Both steretypes have some basis in truth, with the old Teamsters and East Coast Longshoreman (circa 1950) having a variety of connections to the Mafia.  And the West Coast Longshoreman having been laced through throughly with Communist sympathizers.  It didn't really help that Walther Reuther, one of the greats of the UAW (Autoworkers) spent 2 years in Gorkii working at an autoplant with his brother in the 1930's.  

And I'll give my consent to any government that does not deny a man a living wage-Billy Bragg