North Korea is expected to remain largely impervious to Western diplomatic overtures for the foreseeable future as it rails against its rivals’ “hostile” policies.On Tuesday, North Korean state media denounced last month’s summit between US President Donald Trump and South Korean President Lee Jae-myung as proof of the “confrontational will” of its adversaries to “remain hostile … to the end”.The North was taken aback by the outcomes of the Trump–Lee summit, according to Professor Cho Han-bum...