. >> they're mired in igi politics hasf& left him sole w. joining me are nbc news white house correspondent kristen welker. robert costa, former obama deputy campaign managerzf?t step0& cutter and former republican congressman carlos cushelo of = qflorida. welcome to sunday. it's "meet the press." >> announcer: from nbc news in washington, the longest-running show in television history, this is "meet the press" with chuck todd. >> good sunday morning, given the constant storm of controversy and disruption that has defied the trump presidency, it's easy to forget the experience we experienced, donald trump will become a third american president in history to be impeached. >> that much we know or think we do anyway. at the same time, there is so much we don't know. we don't know how many articles of impeachment the democrats will draw against president trump or what they will cover. we don't know what a senate trial would look like. remember, we expected hearings for merritt garland, those never happened. we don't know whether senate republic