President Barack Obama was briefed on a former provincial police chief's overnight stay in a U.S. consulate in China in February while it was in progress or soon after it ended, a senior administration official said Friday, shedding new light on how significantly the U.S. viewed the encounter at the time. The 30-hour visit to the U.S. Consulate in Chengdu by Wang Lijun, who had just been relieved of his job as police chief, rapidly spurred controversy in China and came just a week before Vice President Xi Jinping, who is expected to become China's next leader, paid a visit...