Lee Jae Myung has long pushed for stronger homegrown defences, yet Donald Trump’s move has sparked alarm in some quartersAt their first summit, in August last year, the South Korean president, Lee Jae Myung, told Donald Trump: “If you, Mr President, become the peacemaker, then I will assist you as the pacemaker.”The remark at the Oval Office captured the thrust of Lee’s approach to North Korea: dial down the military posturing and make repeated peace overtures to revive dialogue, even if