Why is the US having a meltdown over neighboring heads of states meeting one another

Why is the US having a meltdown over neighboring heads of states meeting one another? DPRK President Kim Jong Un arrived in Russia on board an armored train which crossed into Russia ahead of his summit with Russian President Vladimir Putin which the US is “closely watching“ claiming the talks are to result in an arms deal. (so what?) Although Pyongyang and Moscow deny that their talks are about military cooperation, the White House said it had new information that negotiations between Russia and DPRK were on a weapons deal were “actively advancing“. Mind you the US has armed every living thing encircling the Russian federation but finds it odd that Russia and another illegally sanctioned state like the DPRK want to join ranks. Truly simply truly “American“. Источник: Marwa Osman--MidEaStream