. >>> right now on "andrea mitchell reports," fiona hill testified that john bolton said rudy giuliani was a hand grenade who was going to blow everybody up. >> there was an official foreign policy attempting to counter corruption in giuliani and then there was rudy giuliani. >>> the russians are coming. russian ground troops filling the vacuum in kurdish areas of northern syria left by the departing u.s. military after the president's abandonment of the syrian kurds. >> this isn't america first. this is america alone. the sad part of this thing, the saddest part for me, is that it was totally predictable. >>> and speaking out. hunter biden finally breaking his silence as he tries to combat the president's smear campaign against him hours before tonight's debate. >> i'm a human. you know what? did i make a mistake? well, maybe in the grand scheme of things, yeah. but did i make a mistake based upon some unethical lapse? absolutely not. >>> and good day, everyone, i'm andrea mitchell in new york. top diplomats are telling all, exposing an unprecedented shadow diplomacy they say was crea