Democratic socialists have infiltrated the party, exciting a dispirited base of young progressives and causing heartburn for the establishment. Candidates aligned with the Democratic Socialists of America are expected to grow their ranks in the House of Representatives after unseating several incumbent Democrats in safe blue seats. WSJ spent time in Detroit with Michigan state Rep. Donovan McKinney, a DSA member, challenging an incumbent Democrat in Tuesday’s congressional primary. If McKinney wins he is expected to cruise through the general election in November. Chapters: 0:00 The rise of the DSA 1:08 New DSA candidates and why Democrats are worried 3:20 The DSA’s growth 5:03 Can the DSA change the Democratic Party? News Explainers Some days the high-speed news cycle can bring more questions than answers. WSJ’s news explainers break down the day's biggest stories into bite-size pieces to help you make sense of the news. #Politics #DSA #WSJ