Senator Evan Bayh of Indiana, who backs Senator Hillary Rodham Clinton for president, proposed another gauge Sunday by which superdelegates might judge whether to support Mrs. Clinton or Senator Barack Obama.
He suggested that they consider the electoral votes of the states that each of them has won.
So who carried the states with the most Electoral College votes is an important factor to consider because ultimately, thats how we choose the president of the United States, Mr. Bayh said on CNNs Late Edition.
In a primary, of course, electoral votes are not relevant, but the Clinton campaign is trying to use them as an unofficial measure of strength.
So far, Mrs. Clinton has won states with a total of 219 Electoral College votes, not counting Florida and Michigan, while Mr. Obama has won states with a total of 202 electoral votes.
Mr. Obama, of Illinois, is ahead of Mrs. Clinton, of New York, in most other leading indicators: popular vote (by 700,000 votes out of 26 million cast, excluding caucuses and the disputed Florida and Michigan results, a difference of about 3 percent); delegates (1,622.5 compared with 1,472.5 for her, according to The New York Timess count); and number of states (27 compared with 14 for her, excluding Florida and Michigan). The opinion polls are mixed but give Mr. Obama a slight edge.
Asked how she could win the nomination, Mr. Bayh said: Well, I do think the popular vote is important. But thats a circular argument. It brings us back to Florida and Michigan.
He said he would also factor in electability and momentum, then added: But ultimately, you know, if you look at the aggregate popular vote, and as we all recall in 2000, to our, as Democrats, great sorrow, we do elect presidents based upon the Electoral College.
The Clinton camp has argued that Mrs. Clintons having won the big states should be an important factor when considering her electability.
Presidential elections are decided on electoral votes, a spokesman for Mrs. Clinton, Howard Wolfson, said in an e-mail message.
But Mr. Wolfson said superdelegates would also be looking at the popular vote when determining which candidate to support.
Bill Burton, a spokesman for Mr. Obama, said that the idea of using the Electoral College as a metric was specious because the Democratic nominee, regardless of whom it was, would almost certainly win California and New York.
Many Democrats, including Mrs. Clinton and Mr. Bayh, have opposed the Electoral College in the past, particularly after 2000, when Floridas 25 electoral votes were awarded to George W. Bush, who became president, even though Al Gore, the Democratic nominee, had won the popular vote nationwide.
At the time, Mrs. Clinton, who had just been elected to the Senate, said, I believe strongly that in a democracy, we should respect the will of the people and to me, that means its time to do away with the Electoral College and move to the popular election of our president.