Shields and Brooks on Trump's subpoena standoff, China trade war HD

Syndicated columnist Mark Shields and New York Times columnist David Brooks join Judy Woodruff to discuss the week’s political news, including 2020 Democrats on the campaign trail in Iowa, the standoff between Congress and the White House over the Mueller report and subpoenas, President Trump’s trade war with China and escalating tensions with Iran. Stream your PBS favorites with the PBS app: https://to.pbs.org/2Jb8twG Find more from PBS NewsHour at https://www.pbs.org/newshour Subscribe to our YouTube channel: https://bit.ly/2HfsCD6 Follow us: Facebook: http://www.pbs.org/newshour Twitter: http://www.twitter.com/newshour Instagram: http://www.instagram.com/newshour Snapchat: @pbsnews Subscribe: PBS NewsHour podcasts: https://www.pbs.org/newshour/podcasts Newsletters: https://www.pbs.org/newshour/subscribe