told bloomberg news has already resulted in a significant drop in illegal border crossings. those moves that president biden made at the border. the details on that in a moment, but first, the details on the new action from today. an immigration advocate calls it quote, the biggest thing since daca and that it is a smart political move by president biden. joining us now to talk all about it, get all the details, kelly o donnell. nbc news homeland security correspondent, julia ainslie, david noriega and joyce vance, because there will be a legal component to this. to julia, walk us through what this action is intended to do. yeah, i think the first thing is a lot of people don t realize there are some immigrants here who can t automatically become citizens by getting married to a u.s. citizen. those who cross illegally are sitting in limbo because if they want to apply, they have to leave the country and sometimes, they might be denied reentry. it s a huge risk for families