We need principles that build power now and for the long term. Here are the organizing lessons I learned from the PMPC and from movements for worker organizing, immigrant rights, Occupy Wall Street, Black Lives Matter, climate justice, Palestine solidarity, and abortion rights. Another progressive news show received millions of dollars from a foundation bankrolled by Wall Street money. We don’t need everyone to agree with us if we build power and use it ruthlessly. We build power by sticking to our principles and forcing Democrats to fulfill our demands instead of surrendering to a party that embraces war and Wall Street just as much as the GOP.