DAVID MARCUS: How Crockett's last stand in Texas could bring down Talarico

Jasmine Crockett, a Texas Congress member, refuses to endorse James Talarico after losing a primary race, raising concerns about Democratic unity. Her decision may weaken Talarico's Senate campaign by removing a potential political advantage over GOP opponent Ken Paxton. The article highlights tensions within the Democratic Party over Black voter influence and the rise of socialist candidates in urban areas.