Unionists and communists
Unions were what prevented marxism in most nations. Without that counterbalance to the outrageous disparities and abuses of 19th Century capitalism it's quite likely the revolution in Russia would have found a home in most western nations. Unions also helped create the middle class in America, which is what turned us into an economic superpower. The GOP is currently at war with the middle class and the result if they are successful will be a country with a small elite and a vast lower class, if effect a giant Mexico.
Study your history on this issue and don't listen to morons who talk out of their ass.