Shields and Brooks on 2019 in review, 2020 predictions

Syndicated columnist Mark Shields and New York Times columnist David Brooks join Amna Nawaz to discuss the week’s political news, including the battle between House Speaker Nancy Pelosi and Senate Majority Leader Mitch McConnell over rules for a Senate impeachment trial, how the presidential primary race is shaping up among 2020 Democrats and the year’s most surprising political developments.