President Trump says he is willing to declare a national emergency if Democrats don't go along with his demands for $5.7 billion for a border wall. Plus, prosecutors investigating Russian interference in the last U.S. presidential election suspect former Trump campaign chairman Paul Manafort shared polling data with a business associate who has links to the Russian intelligence service. This episode: White House correspondent Tamara Keith, Congressional correspondent Susan Davis, national political correspondent Mara Liasson, editor correspondent Ron Elving, justice correspondent Carrie Johnson, and national security editor Phil Ewing. Email the show at nprpolitics@npr.org. Find and support your local public radio station at npr.org/stations.