“You’d have to see him in person to realize how powerful and consistent his message is. He is on message 100% of time…resonating throughout the country, and not just among young people,” says Mike Barnicle of Democratic presidential candidate Bernie Sanders after more than 20,000 people turned out for his rally in Boston over the weekend. Watch images from Sen. Sanders’ record-setting event and listen to the Morning Joe discussion on the “year of the Bern.” Only on MSNBC.