But, several sources tell CNN he has settled on the choice and barring a last-minute hitch plans to officially make his choice later today and introduce him or her tomorrow at a big rally in Ohio.

• 但有消息称麦克恩已决定了人选，可能会在今天最后时刻才正式宣布，并在明天的俄亥俄州举行的聚会上向观众介绍。