President Biden is gaining in popularity — how much of his decision to run again is driven by Vice President Harris' lackluster support among key groups of voters? And Donald Trump is seeing his support among Republicans flag — but with a potentially crowded primary field, he could have a path to the nomination anyway.This episode: White House correspondent Scott Detrow, politics correspondent Susan Davis, and senior political editor and correspondent Domenico Montanaro.This episode was produced by Elena Moore and Casey Morell. It was edited by Eric McDaniel. Our executive producer is Muthoni Muturi. Research and fact-checking by Devin Speak.Unlock access to this and other bonus content by supporting The NPR Politics Podcast+. Sign up via Apple Podcasts or at plus.npr.org. Connect:Email the show at nprpolitics@npr.orgJoin the NPR Politics Podcast Facebook Group.Subscribe to the NPR Politics Newsletter.