When America's liberal elite were offered the chance to pay up to $500,000 each (about £260,000) to attend Bill Clinton's 60th birthday extravaganza tonight - with the added promise of a private Rolling Stones concert - a packed house was expected. Wife Hillary and daughter Chelsea sent out about 10,000 invitations to Hollywood tycoons, movie stars, captains of industry and Wall Street - with all proceeds to go to the former President's charitable foundation. Those who pledged the top price were promised the 'Birthday Chair Package', with the best seating for the concert as well as a chance to have...