House Democrats erupt into infighting over leadership power play

House Democratic leaders are trying to flex some muscle this week after two members defected on a key procedural vote. It's stoking fury among members across the political spectrum. Why it matters: The blowup offers a preview of the chaos that party leaders could face in January if they take back the House majority. Meanwhile, an effort to give House Democratic leaders more tools to keep their members in line next year is falling flat among rank-and-file members. "It'll be dead by next week,"…