immigrants are under attack. last week he also told the "washington post" his concerns for what he called the tone and message for public immigration policy widely seen as an indictment of how the president does those things. given things a breaking story, i'm joined by phone by national security and justicer correspondent for nbc news. thanks for hopping on the line. >> thanks for having me. what a night, ari. >> what happened here? >> so we understand that mccal exenan resigned. he was not forced out. it was widely known the acting head of u.s. citizenship is thought to be auditioning for this job as dhs secretary. he's much more vocal, much more in line with the president and steven miller's thinking.