READ North Korea on Tuesday compared US President Donald Trump to Adolf Hitler shortly before South Korean President Moon Jae-In's visit to Washington. In an editorial, the official KCNA agency believes that the policy of the US president is a form of "Nazism of the 21st century" by denouncing the slogan "America First" put forward by Mr. Trump from his inaugural speech in January. "The" America first principle "aims at world domination through military means, as was the case for the concept of world occupation of Hitler," the agency said. Mr Trump "follows Hitler's dictatorial policy" to divide the world into two categories, "friends and enemies" in order to justify the "suppression" of the latter, the agency adds. North Korea is accustomed to a flourish language to criticize its enemies. But comparisons with Adolf Hitler are rare. On Thursday, Pyongyang called Mr. Trump a "psychopath", in a context tense by the death of Otto Warmbier, an American student repatriated in a coma in the United States after his detention in North Korea. By 2014, KCNA had treated Donald Trump's predecessor, Barack Obama, among other insults, as a "bastard of mixed blood" and spoke of his "monkey-like appearance." KCNA had already reached a new stage in curses by taking a short time before ex-South Korean president Park Geun-Hye, compared to a "prostitute" and Barack Obama, a "mackerel." The Trump administration is working on a tightening of existing international sanctions against North Korea in an attempt to force it to abandon its banned nuclear and ballistic programs. KCNA accused Washington of blocking deliveries of medical products to North Korea, seeing it as "an inhuman and unethical act, much higher than the siege of Leningrad by Hitler." The present-day siege of St. Petersburg by the German army lasted nearly 900 days between 1941 and 1944 and totaled more than two million deaths. The threat posed by North Korea - which is openly seeking intercontinental missiles - is expected this week to be at the heart of the first summit in the United States between MM. Trump and Moon.