Susan E. Rice, a former State Department and National Security Council official who is a foreign policy adviser to the Democratic candidate, said that “for political purposes, Senator Obama’s opponents on the right have distorted and reframed” his views. Mr. McCain and his surrogates have repeatedly stated that Mr. Obama would be willing to meet “unconditionally” with Mr. Ahmadinejad. But Dr. Rice said that this was not the case for Iran or any other so-called “rogue” state. Mr. Obama believes “that engagement at the presidential level, at the appropriate time and with the appropriate preparation, can be used to leverage the change we need,” Dr. Rice said. “But nobody said he would initiate contacts at the presidential level; that requires due preparation and advance work.”