Frustrated with their refusal to budge off maintaining the filibuster to advance President Joe Biden’s liberal agenda, the nation’s top labor leader Tuesday welcomed efforts that could prompt 2024 primary challenges to Democratic Sens. Joe Manchin and Kyrsten Sinema.

Newly installed AFL-CIO President Liz Shuler said that she is supporting local efforts to press West Virginia’s Manchin and Arizona’s Sinema to switch or else.