Senator Hillary Rodham Clinton’s campaign acknowledged this morning that even if all delegates from Michigan and Florida were seated at the Democratic convention, she would not have enough delegates to claim the presidential nomination.

Mr. Singer said that even if the delegates were counted, the campaign would still be about 100 delegates shy of the number needed. The implication was that the gap could not be made up, even if she wins more delegates in the remaining contests, as she is expected to do. He also said he expected the Democratic National Committee’s rules and bylaws committee to seat the delegates from Michigan and Florida to ensure that all voters are represented.

Asked again if it was correct that the Clinton campaign would still not reach the full number of delegates, Mr. Singer said, “That is correct.”