Ukrainian envoy to UK has now warned that U.S.' pivot towards Russia could weaken NATO and embolden the Kremlin. Valerii Zaluzhnyi also appeared to poke U.S. President Donald Trump by saying that the NATO leader was "destroying the rules-based order" by engaging in talks with the Kremlin. His comments came as Lt. Gen. Keith Kellogg (R), Trump’s special envoy to Ukraine and Russia, blamed Ukraine's president for the U.S. decision to cut aid and intelligence to Kyiv. Watch their fiery faceoff here.