Liberal Senator Cory Bernardi is keeping tight lipped about whether he will split from the party.

There are reports he will leave his colleagues as early as tomorrow and form his own conservative group.

The talk is more bad news for Prime Minister Malcolm Turnbull who is bearing the brunt of a Newspoll released today which suggests the Coalition is trailing Labor 46-54% on the two-party vote and its primary vote has fallen to just 35%.

Former Liberal MP and Sky News broadcaster Ross Cameron says liberal party members are somewhere between frustrated and demoralised under Malcolm Turnbull.

He spoke with Oliver Peterson.