There are those who believe wealth should be sequestered by those who have the influence and the means to do so and those who believe in basic housing and food security for all and equal access to quality education and health care.  Without such supports it is difficult to improve one's lot.  Who, at present, speaks for the latter?

There was a green candidate running for president and also a libertarian candidate.

I would certainly have voted for the green candidate to register my protest against both of the leading candidates.

The democrats, excepting a few senators, certainly don't represent the left at present.  A few even voted to affirm Gorsuch's appointment to the Supreme Court and Sander's campaign was certainly undermined by the democratic party.