© Cheryl Senter / The Associated PressFormer House Speaker Newt Gingrich, accompanied by his wife, Callista, suffered a severe blow to his presidential campaign when his top staffers quit.
Washington - The entire top echelon of Newt Gingrich's presidential campaign resigned on Thursday, a stunning mass exodus that left his bid for the Republican nomination in tatters.
But the former House speaker vowed defiantly to remain a candidate.
"I am committed to running the substantive, solutions-oriented campaign I set out to run earlier this spring," the Gingrich said in a posting to his Facebook page shortly after the 16 aides resigned. "The campaign begins anew Sunday in Los Angeles."
Rick Tyler, Gingrich's spokesman, said that he, campaign manager Rob Johnson and senior strategists had all quit, along with aides in the early primary and caucus states of Iowa, New Hampshire and South Carolina.
Other officials said Gingrich was informed that his entire high command was quitting in a meeting at his headquarters in Washington. They cited differences over the direction of the campaign.
"We had a different vision for victory," Tyler told The Associated Press. "And since we couldn't resolve that difference, I didn't feel I could be useful in serving him."
He said Gingrich was not allowing enough time to campaign in key states.
Scott Rials, a longtime aide who joined the departure, said, "I think the world of him, but at the end of the day we just could not see a clear path to win, and there was a question of commitment."
The upheaval in the campaign was likely to lead to a shake-up in the race for the party's presidential nomination as well, as rivals reach out for disaffected staffers, and possibly for donors who have been aligned with the former Georgia congressman.
Gingrich has long been viewed, by even his closest allies, as a fountain of policy ideas but a man who is unable to avoid speaking in ways that spark unwelcome controversy.
Even before the sudden departures of his top aides, Gingrich's campaign was off to a notably rocky start. Within days of formally announcing he would run, he was assailed by conservatives for criticizing a plan to remake Medicare that Republicans pushed through the House.
He telephoned the author of the plan, Rep. Paul Ryan of Wisconsin, to apologize but did not back off his objections.
Within days, he had dropped from sight, embarking on a cruise to the Greek Isles with his wife, Callista.