The impeachment trial gets underway tomorrow. A new brief suggests that Trump's lawyers will defend him on both process and substance. And a vote to convict the former president always seemed unlikely, but Republican opposition to the president appears to have softened in the month since the insurrection. This episode: White House correspondent Scott Detrow, congressional correspondent Susan Davis, and national political correspondent Mara Liasson.Connect:Subscribe to the NPR Politics Podcast here.Email the show at nprpolitics@npr.org.Join the NPR Politics Podcast Facebook Group.Listen to our playlist The NPR Politics Daily Workout.Subscribe to the NPR Politics Newsletter.Find and support your local public radio station.