Newt Gingrich's presidential dreams are in tatters this afternoon after his entire high command resigned in a mass exodus today. The Republican hopeful's campaign manager, senior strategists and key aides in early delegate-selection states all walked out this afternoon, but refused to say why - other than a 'difference in direction'. Rick Tyler, Gingrich's spokesman, said he, campaign manager Rob Johnson and senior strategists were among those who had resigned. 'When the campaign and the candidate disagree on the path, they've got to part ways,' Mr Tyler told the Washington Post this afternoon.