For 15 years, Americans have been told that only a constitutional amendment or the Supreme Court could undo Citizens United. But Citizens United was about rights, not powers. Corporations are not born with political spending authority—they receive only the powers their states choose to grant. Drawing on centuries of precedent, the Center for American Progress’ Tom Moore lays out how states can decide to no longer grant their corporations the power to spend in politics, thereby halting corporate political activity and dark money (no hyphen) spending in local, state, and even federal politics.