US President Joe Biden Wednesday said that Elon Musk’s ties with foreign countries were “worthy” of scrutiny, amid questions over the Saudi acquisition of a stake in Twitter as part of the tycoon’s blockbuster takeover. “I think that Elon Musk’s cooperation and/or technical relationships with other countries is worthy of being looked at,” Biden said, answering a question from a reporter after a long pause. “Whether or not he is doing anything inappropriate, I’m not suggesting that… That’s all I’ll say,” he said. Last month reports emerged that the Biden administration was weighing a national security review of Musk’s $44...