Party leaders might be more extreme now as a result of the close party balance in the House,” said Barry Burden, a political science professor at the University of Wisconsin-Madison. “The narrow margins for the majority party in recent years empower more strident and extreme factions within the party to demand fidelity to their preferences. It is possible that Pelosi’s more liberal position helped her maintain exceptional party discipline even while sometimes managing tenuous majorities.”
Office of Strategic Communication