“She is a game-changer for the presidential. We believe she’s a game-changer for all of our Senate races,” said Rebecca Fisher, a spokeswoman for the Republican Senatorial Campaign Committee, who said the requests for Mrs. Palin to campaign with Senate candidates are rolling in.

“We’ve gotten a lot of requests,” Mrs. Fisher said. “They’re saying, ‘We would love to have her in our state to help.'”