Social media and other online data on both prominent Americans and the U.S. military has been collected since 2017 by a Chinese technology company that purportedly markets itself to clients in the country’s military, government and commercial sector.

President Trump declared the “dawn of a new Middle East” as he oversaw the signing of pacts between Israel and two Arab nations, an event he hopes will pave the way for increased stability in a volatile region and cast him as a peacemaker ahead of November’s election.

It has been clear for some time that the United States should do less in the Middle East, despite the attendant risks and costs—a case that we made in these pages last year (“America’s Middle East Purgatory,” January/February 2019). At the time, some welcomed this argument; others balked at it. …