Marxist University #7: Fascism: What it is and how to fight it

With the election of Trump, fascists have felt emboldened, carrying out bloody attacks. With the polarization of American politics, it has become commonplace for political commentators to refer to Trump as a fascist and warn about the rise of fascism. But what is fascism? Is Trump a fascist? How does fascism arise and how can we effectively fight against it and win?