WASHINGTON — Loyal Democrat Richard Somer says if Hillary Rodham Clinton gets his party's presidential nomination, he just may sit it out this Election Day.

A Barack Obama supporter, Somer says he has been repulsed by her use of "slimy insinuations" in the campaign. He especially disliked her attacking the Illinois senator for his relationship with William Ayers, a former Weather Underground radical with provocative views.

"She's better than that," said Somer, 72, a retired professor from Clinton, N.Y. He said he expects the Democrats to carry New York anyway, so he might not vote "as a protest to Mrs. Clinton."

Somer is not the only Democrat whose views of his party's rival candidate have soured.

Party members increasingly dislike the contender they are not supporting in the bruising nomination fight, an Associated Press-Yahoo News survey and exit polls of voters show. That is raising questions about how faithful some will be by the November general election.

In the AP-Yahoo poll — which has tracked the same 2,000 people since November — Obama supporters with negative views of the New York senator have grown from 35 percent in November to 44 percent this month, including one-quarter with very unfavorable feelings.

Those Obama backers who don't like Clinton say they would vote for Republican candidate John McCain over her by a two-to-one margin, with many undecided.

As for Clinton supporters, those with unfavorable views of Obama have grown from 26 percent to 42 percent during this same period — including a doubling to 20 percent of those with very negative opinions.

The Clinton backers with unfavorable views of Obama say they would vote for McCain over him by nearly three-to-one, though many haven't made up their minds.

"I'd be hard pressed" to vote for Obama, said April Glenn, 66, a Clinton supporter from Philadelphia, who said his handling of the controversy over the anti-American preachings of his former pastor, the Rev. Jeremiah Wright, made her doubt his leadership skills. "I don't think he's capable."

Clinton backers who have taken a dislike to Obama have a sharply lower regard for his honesty and ethics than they did last fall, the poll shows. Obama supporters whose view of Clinton has dimmed see her as far less compassionate and refreshing than they did then.

The feelings seem especially widespread among the candidates' strongest supporters:

n About half of Obama's white backers with college degrees have negative views of Clinton. Fewer black Obama supporters dislike Clinton but their numbers have grown faster, more than doubling during the period to 33 percent.

• Among Clinton's supporters, Obama is disliked by nearly half the whites who have not gone beyond high school, a near doubling since November. Four in 10 white women backing her have unfavorable views of Obama.

Intensified passions during contentious intraparty fights are nothing new, and voters often return to the fold by the time the general election rolls around and people focus on partisan and issue differences.

"These are snapshots of today," said Rep. Rahm Emanuel, D-Ill., a member of his party's congressional leadership who has not committed to Clinton or Obama. By autumn, he said, "the party will come together."

Yet with the battle between the two contenders threatening to stretch into June or beyond, some Democrats are wondering whether the party will have time to regain the loyalty of those whose candidate failed to win the party's nomination.

"If we can bring this to a conclusion by mid-June or something, I think that healing can take place," Tennessee Gov. Phil Bredesen, who has been pressing party leaders to settle on a nominee quickly, said in an interview. "If it goes till late August, then it's a real problem."