good evening. i'm katy tur in for chuck todd. we begin with breaking news. kirsten nielsen will be speaking to reporters about the trump administration's zero-tolerance policy at the border. once she comes to the podium, we might abrupt lly stop what we'r doing, so bear with us. it is a policy that's received intense and escalating criticism from democrats and republicans, independents, psychologists, human rights watch dogs, you name it, for breaking up families. we've even heard some democrats calling for secretary nielsen to resign. we'll take you the this briefing when it begins. the trump administration is touting that policy while also decrying it. in fact, the trump administration is touting it, decrying it, taking credit for it, blaming democrats for it, calling it a bargaining chip, and denying it exists all together. we've soon this policy slammed