Kenyan presidential candidate Raila Odinga declared the results of the election “null and void” and promised to challenge them in court, ignoring calls for him to concede to declared winner William Ruto. Ruto was named the winner of last week’s election by Wafula Chebukati, chair of Kenya’s Independent Electoral and Boundaries Commission (IEBC), on Monday — an announcement marred with allegations of vote-rigging and dissent among commission members over the close-fought race. His statement raises the specter of violence between his supporters and the winner’s, which has marred past elections. So far, aside from scattered protests, Kenya has been quiet...