Conversation with Azu If Donald J. Trump were president of Wakanda on the eve of an election, that country would have received several warnings from the US State Department on the need for free and fair polls, and the necessity for all parties to play by the rules. But what is playing by the rules if parties will not accept an orderly transfer of power? During two recent off-cycle state elections in the south of Nigeria, for example, the US Embassy threatened to invoke visa restrictions on candidates, agents or security officials...