But she took an entirely different tone on Wednesday, when she chastised reporters for asking her questions about her war with some staff members in the McCain campaign at such a heady time. “Barack Obama has been elected president,” Ms. Palin said. “Let us, let us  let him  be able to kind of savor this moment, one, and not let the pettiness of maybe internal workings of the campaign erode any of the recognition of this historic moment that we’re in. And God bless Barack Obama and his beautiful family.”

There is a great tradition of paint-peeling political hyperbole during presidential campaign years. And there is an equally great tradition of backing off from it all afterward, though with varying degrees of deftness.

But given the intensity of some of the charges that have been made in the past few months, and the historic nature of Mr. Obama’s election, the exercise this year has been particularly whiplash-inducing, with its extreme before-and-after contrasts.

The shift in tone follows the magnanimous concession speech from Mr. McCain, of Arizona, who referred to Mr. Obama’s victory Tuesday night as “a historic election” and hailed the “special pride” it held for African-Americans. That led the vice president-elect, Senator Joseph R. Biden Jr., to get into the act. During the campaign, Mr. Biden said he no longer recognized Mr. McCain, an old friend. Now, he says, “We’re still friends.” President Bush, in turn, also hailed Mr. Obama’s victory, saying his arrival at the White House would be “a stirring sight.”

Whether it all heralds a new era of cooperation in Washington remains to be seen, and it may be downright doubtful. But for now, at least, it would seem to be part of an apparent rush to join what has emerged as a real moment in American history.