The U.S. agency that enforces laws banning workplace discrimination said in a court filing on Wednesday it is investigating Nike (NKE.N), opens new tab for allegedly discriminating against white people through its diversity policies. The Equal Employment Opportunity Commission said in the filing, opens new tab that the footwear and apparel company has refused to comply with a sprawling subpoena seeking information such as data on the racial and ethnic makeup of the company's workforce and a roster of employees chosen for mentoring and development programs.