Everyone and everything threatened by Trumpism must be a part of this movement. We need a drawing-together of the many constituencies who are, today, wondering whether this country is a place for them. Fortunately, there are certain areas in which movements are already strong and cohesive: Against racism, we have Black Lives Matter and an entire superstructure of organizations built up over the decades of the civil rights movement that work to try to extend those gains bit by bit; against climate change, we have a fairly coherent global movement, though it is dependent on cooperation from governments. Many other groups that awoke to an existential threat today will have to gird themselves for the sort of fight that they may have hoped had receded into the past. The women’s movement, which faces the structural challenge that accompanies trying to organize a group encompassing half the country’s population, will need to get on war footing fast; those of us who value the First Amendment—writers, artists, journalists, entertainers, academics, activists—will need to prepare for challenges that would have seemed unthinkable one year ago; immigrant and Muslim groups must be embraced and strengthened enough to make them formidable political powers; organized labor must find a way to make itself a force to be reckoned with once again.