NATO Secretary-General Mark Rutte sought to calm tensions with President Donald Trump at the White House on Wednesday, using a mix of flattery and gentle pushback to argue that instances of allies' reluctance to support the U.S. war with Iran were limited to "isolated cases." Trump, a longtime NATO critic who has called the alliance a "paper tiger," has been angered by allies' refusal to support the U.S. in the Middle East conflict or help reopen the Strait of Hormuz after a U.S.-Israeli attack on Iran on February 28 disrupted the major oil shipping route. During the Oval Office meeting,...