How Bernie Sanders’ Popularity Creates Trouble for His Campaign

As the 2016 contender surges in the polls, progressive activists are pushing Sanders more forcefully to embrace a scattered agenda.

BURLINGTON, VT - MAY 26: U.S. Sen. Bernie Sanders (I-VT) waves to supporters before officially announcing his candidacy for the U.S. presidency during an event at Waterfront Park May 26, 2015 in Burlington, Vermont. Sanders will run as a Democrat in the presidential election and is former Secretary of State Hillary ClintonÕs first challenger for the Democratic nomination. 
National Journal