PBS NEWSHOUR: Syndicated columnist Mark Shields and New York Times columnist David Brooks join Judy Woodruff to discuss the week’s news, including Secretary of State Rex Tillerson’s firing amid a wave of rumors about a wider Cabinet shakeup, Pennsylvania’s stunning election upset and Sen. Jeff Flake’s comments about 2020. Brooks, who identifies as a conservative, lamented that Trump is "anti-system" and won't work through what he said is the "vast apparatus" in the White House. "Trump is getting Trumpier, and the administration is getting Trumpier," Brooks said. .... (snip) The scribe said he has spent much time with Trump supporters...