Rudy Giuliani told supporters Wednesday he's abandoning his bid for president and backing Republican rival and longtime friend John McCain.
Rep. Peter King, a New York Republican and adviser to Giuliani, said the former mayor called him this morning to tell him of his plan.
Giuliani "will be announcing his endorsement today," said King.
"I expect him to be fairly active for McCain. There is a real friendship and respect between the two," he said. A similar call took place between Giuliani and New York Senate Majority Leader Joe Bruno.
"I spoke with Rudy Giuliani this morning and he confirmed that he is dropping out of the race and will endorse Senator John McCain for president," Bruno said in a statement.
Once the Republican presidential front-runner, Giuliani suffered a debilitating defeat in Tuesday's Florida primary.
The former mayor finished a distant third to the winner, McCain, and close second-place finisher Mitt Romney. After the results, Republican officials had said Giuliani would endorse McCain on
Wednesday in California.
The officials spoke on condition of anonymity in advance of the public announcement.
Speaking to supporters Tuesday night, Giuliani stopped short of announcing he was stepping down, but delivered a valedictory speech that was more farewell than fight-on.
"I'm proud that we chose to stay positive and to run a campaign of ideas in an era of personal attacks, negative ads and cynical spin," Giuliani said as supporters with tight smiles crowded behind him. "You don't always win, but you can always try to do it right, and you did."
Republican presidential candidates were scheduled to debate at the Reagan presidential library in Simi Valley on Wednesday night.
"I haven't talked to him," McCain said as he boarded a campaign charter plane Wednesday morning. "I'm going to talk to him today when we meet."
Separately, Giuliani said as he prepared to leave Florida for California Wednesday he was "not yet" ready to announce his intentions.
Tuesday's result was a remarkable collapse for Giuliani. Last year, he occupied the top of national polls and seemed destined to turn conventional wisdom on end by running as a moderate Republican who supported abortion rights, gay rights and gun control.
The results seriously decimated Giuliani's unconventional strategy, which relied heavily on Florida to launch him into the coast-to-coast Feb. 5 nominating contests.
But Florida proved to be less than hospitable. His poll numbers dropped and key endorsements went to McCain.
Surveys of voters leaving polling places Tuesday showed that Giuliani was getting backing from some Hispanics, abortion rights supporters and people worried about terrorism, but was not dominating in any area.
McCain, addressing his own supporters moments later in Miami, gave Giuliani a warm rhetorical embrace, a possible prologue to accepting Giuliani's expected support.
"I want to thank my dear friend, my dear friend Rudy Giuliani, who invested his heart and soul in this primary and who conducted himself with all the qualities of the exceptional American leader he truly is," McCain said. "Thank you, Rudy, for all you have added to this race and for being an inspiration to me and millions of Americans."
Giuliani hung his bid for the Republican presidential nomination on his leadership. His stalwart performance as New York mayor in the tense days after the Sept. 11, 2001, terrorist attacks on New York and Washington earned him national magazine covers, international accolades and widespread praise.
Steadfast in a crisis, as a candidate Giuliani was a bundle of contradictions, so much so that he liked to joke that even he didn't always agree with himself.
A moderate-to-liberal New Yorker who backed abortion rights, gay rights and gun control in a party dominated by Southern conservatives, Giuliani became a Republican mayor of an overwhelmingly Democratic city. Campaigning for national office, he claimed to have created the most conservative government in the most liberal city in America.
After earning a reputation as a tough-talking, even abusive executive, Giuliani the presidential candidate was mostly mild-mannered in debates, even as those around him got meaner.
Giuliani, 63, first gained prominence as a crime-busting federal prosecutor in New York City. Jailing mob bosses, Wall Street executives and corrupt politicians helped propel his next career as a politician, but it wasn't an immediate success. He lost the first time he ran for mayor in 1989 before winning in 1993.
As mayor, he fostered a take-charge image by rushing to fires and crime scenes to brief the press, but some critics felt he was more concerned about taking credit from others for what became a historic decline in the city's crime rate during his tenure.
A bout with prostate cancer and the very public breakup of his marriage with second wife Donna Hanover - she first learned he was filing for divorce when he made the announcement at a televised news conference - forced Giuliani to withdraw from a race for the U.S. Senate against Democrat Hillary Rodham Clinton in 2000. The messy divorce was revisited in awkward detail once he re-entered politics.
With no working strategy in his presidential campaign, no primary victories and dwindling resources, the mayor's third-place finish in Florida spelled the end of his run, even if his crestfallen supporters couldn't believe it.
"They'll be sorry!" a woman with a New York accent called out to the mayor as he spoke. "You sound like my mother," Giuliani joked.