What they share, in addition to enthusiasm for Bernie Sanders, is a deep skepticism of the Democratic Party’s mobilization against the president. The left’s struggle against the center-left is the axis around which their politics revolves. From that perspective, the Russia scandal and impeachment are unnecessary and even reactionary.
While incomprehensible to liberals, centrists, and even many leftists who work within two-party politics, left-wing anti-anti-Trumpism has a coherent logic. It takes as its starting point a familiar critique that Trump won because liberalism failed. Trump, while bad, is merely a meta-phenomenon of the larger failure of the Democratic Party and the political and economic Establishment.