Here is the letter. If Jim Bopp, Paul Ryan, and Bob Bauer all agree there is a problem with the FEC’s rule (my own thoughts on it are here), let’s hope the FEC is paying attention.
(It is worth noting that the era of the Internet gives the FEC a great opportunity to get immediate feedback on its proposed rules. Think of how much more information the FEC has now going into this meeting than it would have had in the days before these things could be posted and disseminated so quickly).