Since the onset, Dr Mahathir Mohamad has been campaigning for the ouster of Prime Minister Najib Abdul Razak on the premise that if the latter remains at the helm, Umno and BN might be defeated in the next general election.

But this clarion call has gained minimal traction among those in Umno, and now with the removal of his son Mukhriz Mahathir as Kedah menteri besar, the feud has become personal.

This prompted a DAP lawmaker to wonder if the former premier would cross the Rubicon, and work with the opposition.