The Liberal conservatives’ unofficial mouthpiece, Peta Credlin, unspooled a new tripwire for the Turnbull Government on the weekend, claiming a win for Malcolm Turnbull on corporate tax cuts would be a loss for Scott Morrison -- and vice versa.

From her Sky News platform on Sunday morning, knowing that her meagre audience was mostly journalists and a few political tragics, Credlin framed the debate over company tax within the government as being between “two warring camps” headed by the policy purist Turnbull and the political pragmatist Morrison.