again from our nbc news headquarters here in new york. day 504 of the trump administration, and president trump assured everyone today he doesn't need to prepare very much for the upcoming nuclear summit with north korea. just hours after launching a fresh round of attacks on the russia investigation. we are also following a new report from "the new york times" tonight that details how associates of former trump campaign chairman paul manafort are abandoning him as special counsel, robert mueller, closes in. we'll have more on that in just a moment. first, the president's all-out barrage against special counsel robert mueller's team, the obama administration, and, of course, former fbi director james comey. the president wrote on twitter, in part, quote, isn't it ironic getting ready to go to the g7 in canada to fight for our country on trade, capital t, then off to singapore to meet with north korea and the nuclear problem. but back home, we still have the