DSA has taken a strategic approach to grow its power within the Democratic Party, picking off two House incumbents already this year and potentially a third on Tuesday in Michigan. As the group’s summit in Chicago made clear, its members see this as only the beginning of a fight against both Republicans and Democrats alike.

Elections vs. revolution, pragmatism vs. purity, pro-AOC vs. anti — a journalist who knows DSA well walks us through them.

It was inevitable that, at some stage, America's populist Left would try to do to the Democratic Party what the populist Right has already done to the Republican Party: take it…