House Democrats officially unveiled two articles of impeachment against President Trump at a press conference on Tuesday morning: abuse of power in the Ukraine affair and obstruction of Congress. The scope of the charges, which make only a passing reference to special counsel Robert Mueller's investigation into Russian interference, reveals the sway of Democrats' moderate members in shaping the impeachment process.Within hours of that announcement, Democratic leaders convened a second press conference, this time to unveil a deal with the White House on the United States-Mexico-Canada trade agreement — a major legislative priority for many moderates in the Democratic caucus.This episode: political correspondent Asma Khalid, congressional correspondent Susan Davis, and senior editor and correspondent Domenico Montanaro.Connect:Email the show at nprpolitics@npr.org.Join the NPR Politics Podcast Facebook Group.Subscribe to the NPR Politics Newsletter.Find and support your local public radio station.