The Last Word with Lawrence O'Donnell 12/22/17

Ex-U.S. Attorney: Mueller probe likely to go 'well into 2019'

House Republicans are pushing to end their Russia probe, but ex-federal prosecutor Paul Butler says even if those probes wrapped up, Robert Mueller's will likely go through 2018 and into 2019. How will Trump & the GOP respond? Betsy Woodruff also joins Ali Velshi. ... more Duration: {{video.duration.momentjs}}