INSERT DESCRIPTIONHillary Rodham Clinton in Rapid City, S.D., Thursday. (Photo: Elise Amendola/Associated Press)

RAPID CITY, S.D. – After a day spent doggedly campaigning and talking only of her agricultural agenda, Senator Hillary Rodham Clinton held an impromptu news conference on a windy airport tarmac today to criticize President Bush and Senator John McCain.

Mrs. Clinton first addressed Mr. Bush’s remarks, made in a speech in Jerusalem, suggesting that talking to “terrorists and radicals†is no different than the appeasement policies toward Hitler and the Nazis.

“President Bush’s comparison of any Democrat to Nazi appeasers is offensive and outrageous,†Mrs. Clinton said. “Especially in the light of his failures in foreign policy. This is the kind of statement that has no place in any presidential address.â€

She also took Senator John McCain to task over his speech this morning, in which he stated a new timetable for withdrawing troops from Iraq.

Mrs. Clinton said Mr. McCain’s statement “didn’t come with any new strategy or a clear recognition of the very serious difficulties that the Bush policy, now continued by Senator McCain, will encounter. I think it’s time for a change in course.â€

Until the hastily arranged news conference, Mrs. Clinton had spent most of her day ignoring the political firestorms that had erupted over Mr. Bush and Mr. McCain’s remarks.

She declined to take questions from reporters as she made idle chit chat on her campaign plane this morning. An evening fundraiser in Los Angeles later today is strictly closed to the press.

And while the rest of the political world squabbled over foreign policy, Mrs. Clinton took her struggling presidential campaign bumping over dusty, dirt roads in South Dakota for a speech focusing solely on her farm agenda.

Only after arriving in Rapid City for a refueling stop did Mrs. Clinton briefly address reporters, calling President Bush’s comments “offensive and outrageous.â€

She had just finished a campaign event in rural farmland outside Aberdeen, where she spoke on the front porch of a tan farmhouse as a small crowd politely applauded. “I am proud to be here on a day when the farm bill finally passed,†Mrs. Clinton said. (She was en route to South Dakota when the Senate voted overwhelmingly for the five-year, $307 billion bill.)

Mrs. Clinton stuck to the issues of agricultural jobs, food production and country-of-origin labeling, scarcely mentioning her opponents, and deploying her folksiest tone as she took questions from the rural audience gathered at the Jones Farm in Bath.

“We have a lot of dairy farms in New York,†she told one man who introduced himself as a dairy farmer. “How big is your, um, herd?â€

And earlier in the day, Mrs. Clinton wandered to the back of her new charter plane – outfitted with a wet bar, leather sofas and extra-wide seats – but mostly kept the conversation limited to exchanging stories about deer sightings outside her Washington home.

When one reporter asked her reaction to Mr. Edwards’s endorsement, she said only, “I’m not answering any serious questions,†keeping her wide smile intact.

Her visit to South Dakota, a state where Mr. Obama is currently favored, came nearly three weeks before the primary there. Mrs. Clinton has campaigned in the state once before, and promised that both she and her husband would be back before June 3.