Remember when the Supreme Court said corporations could spend without limit in elections? Well, Rep. Donna Edwards (D-Maryland) and Rep. John Conyers (D-Michigan) have introduced a constitutional amendment that would ensure that "Congress and the States may regulate the expenditure of funds for political speech by any corporation, limited liability company, or other corporate entity."With the amendment limited to corporations only, nonprofits and advocacy groups wouldn't be affected. That might take care of Glenn Greenwald's concerns. Clarence Thomas has pointed out that The New York Times is also a corporation, and we might not want to tamper with their rights, but media outlets already have exemptions for political speech and presumably those could be preserved.I'm not sure if an amendment like this could pass, but if you're on board with the cause or want to learn more, head over to the Free Speech for People campaign.