Former prime minister John Howard says Labor Senator Sam Dastyari should leave parliament.
Mr Howard also accused Opposition Leader Bill Shorten of protecting the embattled Senator Dastyari because he relies on his factional support.
Mr Shorten has refused to call on Senator Dastyari to resign from the Senate or the Labor Party.
Senator Dastyari is reported to have told Chinese Communist Party-aligned donor, Huang Xiangmo that his phone might be tapped, a move which has been widely condemned.
Should Senator Dastyari resign?