CBS Philly: Management at the Philadelphia Inquirer and Daily News and the media company’s largest labor union are both digging in their heels in contract negotiations. Members of the Newspaper Guild of Greater Philadelphia, representing about 445 workers, have authorized the union’s executive board, by a vote of 263-15, to begin strike preparations. Workers for the online service Philly.com, who have a separate contract, also voted (24-7) in favor of preparing to strike against the parent company, Philadelphia Media Network.