Arrayed against Trump and MAGA is a cross class, people’s coalition. There is nothing pure about it; if anything, its diverse and motley. At the center of this coalition, unless you embrace a narrow and, in the end, self defeating understanding of it, is Joe Biden, the Democratic Party (which is trending in a progressive direction), and allied organizations, not least the labor movement (which is also trending in a progressive direction).
The left in its non-sectarian forms and social justice movement are in the mix too, but, by no stretch of the imagination, are they the leading component or setting the agenda of this disparate, wide ranging coalition. To the degree that they properly understand the nature of this coalition and where they fit in it will determine how and to what extent they contribute to the overarching challenge of smacking down Trump and electing Biden when tens of millions cast their votes in November.