The 10th Circuit decision in FTC v. Mainstream Marketing Serv is a huge win for the FTC. The court not only vacated the injunction blocking implementation of the do-not-call list, but said that it thinks the FTC is very likely to win on the merits.
The key to the panel's decision is that it finds in the agency's deliberative records, and in the original statute's legislative history, reasons why one could believe that commercial calls are (a) more annoying to consumers than non-commercial calls and (b) why the risk of fraud and other harms is greater from commercial calls than from non-commercial calls: