Bernshevik
Bernshevik, noun, a play on the word Bolshevik, a group led by Lenin that seized control of the government in Russia in 1917 and introduced a socialist economic system, to describe a dedicated follower of Bernie Sanders, an advocate for a socialistic future for the United States.
The Bernsheviks are determined to move the United States towards a socialist utopia even though such economic systems fail wherever they are tried. See Venezuela or Cuba.