Citizens for Responsibility and Ethics in Washington sent a letter to the Secret Service asking about visits from 18 executives representing health insurers, drug makers, doctors and other players in the debate. The group wants the material in order to gauge the influence of those executives in crafting a new healthcare policy.

The Secret Service sent a reply stating that documents revealing the frequency of such visits were considered presidential records exempt from public disclosure laws. The agency also said it was advised by the Justice Department that the Secret Service was within its rights to withhold the information because of the “presidential communications privilege.”…

As a candidate, President Obama vowed that in devising a healthcare bill he would invite in TV cameras — specifically C-SPAN — so that Americans could have a window into negotiations that normally play out behind closed doors.