Nearly 2,200 government employees involved in foreign policy issues signed a letter delivered to Secretary of State Hillary Rodham Clinton yesterday calling on the government to give equal benefits to same-sex partners. The Bush administration had eased some rules, opening up some training to same-sex partners, but had resisted efforts to treat homosexual partners the same as married couples. But Clinton, during her confirmation hearings, indicated a greater willingness to explore the issue. "I think that we should take a hard look at the existing policy," Clinton said in response to a question from Sen. Russell Feingold (D-Wis.). "My understanding...