At the insistence of members of the Republican Party, Vice-President Dick Cheney agreed not to work blue during the Republican National Convention, GOP sources reported Monday. 'I sat him down and said, 'Dick, this is going to be on television, and we want to project a good, family-friendly image. You've gotta keep it clean,'' Republican National Committee chairman Ed Gillespie said. 'I keep trying to get it through to him that using the 'F' word just shows a lack of imagination.' A spokesman for Cheney said the vice-president will tone down his speech, but argued that Cheney is 'only saying what everyone's already thinking.' 