The Coalition faces a potential permanent split after National Party leader David Littleproud and his entire front bench quit the shadow ministry. The crisis erupted when Opposition Leader Susan Lee accepted the resignations of three National senators who crossed the floor to vote against Labor's hate speech laws, defying Shadow Cabinet solidarity. Speculation mounts about challenges to Lee's leadership from Angus Taylor or Andrew Hastie, while concerns grow that the chaos could benefit Pauline Hanson's One Nation party in the polls.