AFAICT, people on the radical left of U.S. politics (which is not that far left as far as international politics in industrialized countries is concerned) probably don’t feel either candidate is very leftist. Essentially, the choice is still between two neoliberals so the main determiner is going to be name brand recognition and the resignation to the fact that a neoliberal is still better than a fascist or a theocrat.

Chomsky: I’d ‘absolutely’ vote for Hillary Clinton • 2016 Jan 25 • Nolan D. McCaskill • Politico