Political "do not call" list for robo-calls?

Political calls are currently exempt from the National Do Not Call Registry, but if a new nonpartisan nonprofit organization gets its way, automated robo-calls and other political "phone spam" will be outlawed. A dozen states already have laws banning or limiting robo-calls (or at least restricting when or how often they can be made). I'm sure most people think that when they signed up for the Do Not Call Registry, then they wouldn't receive any solicitations. Here's a link to the group's site.