The political fallout over claims that the Bush administration was riven by infighting over the Iraq war deepened yesterday when the president's former chief of staff confirmed that he twice sought to sack Donald Rumsfeld, the defence secretary.Andrew Card said George W Bush rebuffed his and others' demands to sideline Mr Rumsfeld, who had been accused of mishandling post-war security. The confirmation yesterday triggered talk in Washington that alternative candidates were being sounded out to lead the Pentagon. The latest bout of speculation began with claims in a new book, State of Denial, by the Watergate journalist Bob Woodward. Mr...