Speculation has focused on lax Moroccan policing, attractive Spanish immigration policies and misinformation from human traffickers. In reality, experts said, it’s too early to know.

South Korea’s KOSPI index has swung wildly because of both the enthusiasm and anxiety related to investing in the global artificial intelligence boom.

It was the latest sign that the president was doubling down on his fight for aspects of a deal that brings him vast benefits, even though they have jeopardized the confirmation of his pick for attorney general.