According to Vox, "Progressive activists know their enemy in the 2020 Democratic primary: Joe Biden." As Vox notes, "Some activists at Netroots conceded they would support Biden in a general election if they had no other choice."
Dean Obeidallah of CNN and The Daily Beast finds this concession a sign of a pragmatism that should make President Donald Trump quake with fear, as opposed to the rock-bottom minimum expectation for a group that claims to believe the president is an existential threat to the republic. Not unlike the Hollywood types who take private jets to climate change conferences, the gap between rhetoric and action is considerable.
After a Mere Four Years, Obama Nostalgia Is Gone