Photo: SAUL LOEB/AFP/Getty Images May has been an especially cozy month in the online relationship between President Trump and North Korean dictator Kim Jong-un. Trump began the month announcing his confidence in the authoritarian figure — “He also knows that I am with him & does not want to break his promise to me” — reiterating that pledge on May 25. And during his trip to Japan, Trump said he concurred with Kim’s assessment that Joe Biden is a “fool of low IQ.” “I think they agree in their assessment of former vice-president Joe Biden,” said Sarah Huckabee-Sanders, clarifying that the president did indeed defend Chairman Kim’s insult of the former veep. Many Trump tweets fail the test of time, and it seems that’s already true of his recent messages of goodwill toward Kim. According to Chosun Ilbo, South Korea’s largest daily newspaper, the North Korean government has executed its special envoy to the United States on spying charges. In March, Kim Hyok-chol was reportedly executed by firing squad for being “won over by the American imperialists to betray the supreme leader,” as part of the Kim government’s purge of its nuclear negotiators after talks in Hanoi went nowhere. The…