A few updates on legislative proposals post-Citizens United. Today, Craig Holman supports The Shareholder Protection Act here.
An OpenCongress collection of material related to legislative and policy proposals post-Citizens United is available here.
For state legislation, check the National Conference of State Legislatures Citizens United page here. There seems to be some private legal action involving Citizens United issues not listed (such as the recent activity in Montana and Michigan), but it’s a very helpful list.