The political action committee that recruited and helped fuel the rise of Rep. Alexandria Ocasio-Cortez (D., N.Y.) on Tuesday announced 11 new endorsements in races across the country, bringing its total slate of candidates to 27.

Brand New Congress, an organization that describes itself as “post-partisan” and endorsed candidates during the last midterm elections, is backing primary challengers to incumbents including Reps. Gregory Meeks (D., N.Y.), Debbie Wasserman Schultz (D., Fla.) and Derek Kilmer (D., Wash.). In addition...