Senator Hillary Clinton plans to formally endorse Barack Obama on Saturday at a Washington event with her supporters, her campaign said last night, and will call on Democrats to unite behind their presumptive presidential nominee. "Senator Clinton will be hosting an event in Washington, D.C., to thank her supporters and express her support for Senator Obama and party unity," her campaign said in a statement last night. "This event will be held on Saturday to accommodate more of Senator Clinton's supporters who want to attend."
