Finance Minister Mathias Cormann is standing by his decision to withdraw support from Malcolm Turnbull in the wake of a leadership ballot brought on without notice last Tuesday by the former Prime Minister.
Senator Cormann also rejected media reports he relied on incorrect advice about the level of party room backing for Peter Dutton before shifting his support away from Mr Turnbull.
"I was the leader of the government in the Senate last week who, in the wake of a leadership ballot initiated without notice by the former Prime Minister, was presented with information by colleagues which I felt duty bound to share with Malcolm Turnbull, which I did share with Malcolm Turnbull," he said.
"The judgment I formed was that the party room had lost confidence in the former Prime Minister, that there was a view that there was a need for change.
"My judgment and decisions are on the record, I stand by the judgments and decisions that I've made."
Senator Cormann's decision to back leadership challenger Peter Dutton was decisive in Mr Turnbull's loss of support after the former Prime Minister resigned then recontested the Liberal party leadership last Tuesday.
The influential Western Australian said it would have been "easier to sit on the sidelines and it would've been much more comfortable for me personally to do nothing".
"I took the decision that I needed to take responsibility, that I was in a particular position where I had a role to play and take responsibility," Senator Cormann said.
"Leadership ballots are leadership ballots," he said.
"People will make all sorts of predictions and make all sorts of assumptions.
"The truth is a decision was made and I respect the decision, I accept the decision, I support the decision, I 100 per cent support Scott Morrison and Josh Frydenberg, and we now get on with it."