"The rating of both BJP and TDP has come down due to the failure to grant special status to the state as promised under the Andhra Pradesh Re-organisation Act," he said.
Rao was speaking to reporters after visiting the Kanaka Durga Temple here.
BJP and TDP are allies in the ruling coalitions in Andhra Pradesh and also the Centre.
The TDP lawmaker said he expects Prime Minister Narendra Modi, who will be here on October 22 to take part in the foundation laying ceremony of the new capital region, to make a positive statement on the special status issue.