Senator Hillary Rodham Clinton will endorse Senator Barack Obama on Friday, bringing a close to her 17-month campaign for the White House, aides said. Her decision came after Democrats urged her on Wednesday to leave the race and allow the party to coalesce around Mr. Obama. Mrs. Clinton’s aides said she would “express her support for Senator Obama and party unity” at an event in Washington that day. One adviser said that Mrs. Clinton would concede defeat, congratulate Mr. Obama and proclaim him the party’s nominee, while pledging to do what was needed to assure his victory. Her decision came...
