US President Donald Trump’s call to “substantially” reduce US-South Korea military drills has revived speculation that he is trying to persuade North Korea’s leader Kim Jong-un to attend another summit between them even though Kim has expressed no such interest. Trump’s comments in a social media post on Sunday came as South Korea and the US began their annual Ulchi Freedom Shield exercise on Monday, putting Seoul in an awkward position of defending the alliance while not undercutting his latest...