How the new generation of left-wing US media is powering progressive candidates

Progressive candidates continue to rack up wins in primary elections across the United States, propelled by a new left-wing media ecosystem allowing them to build a national profile on their own terms — and sidestep the traditional gatekeepers of the Democratic establishment. For Pennsylvania state Representative Chris Rabb, a Democratic socialist who recently prevailed in a congressional primary against a more moderate rival, appearances on programs like “The Majority Report with Sam Seder” and...