Following Republican National Committee Chairman Reince Priebus’ phone call to presidential candidate Donald J. Trump, Mike Barnicle talks with The Washington Post’s Robert Costa about comments alleging Chairman Priebus asked Trump to ‘tone it down’ on his immigration comments. “What’s the over-under on how long Reince Priebus got to talk to Donald Trump during an hour-long conversation?,” asks Mike on Morning Joe. Listen to Costa discuss his reporting on the subject. Only on MSNBC.