Peter Dutton insists Bridget McKenzie's resignation is not an embarrassment for the government.
Senator McKenzie resigned after an investigation by the prime minister's department boss Phil Gaetjens found she did not properly declare memberships of gun clubs that received grants when she was sport minister.
While she did not personally benefit, it was a breach of ministerial standards.
However the Gaetjens report rejected any notion of the grants scheme being used to pork-barrel marginal seats ahead of the 2019 election.
When asked on Today if he was embarrassed after publicly supporting Senator McKenzie hours before her resignation, the Minister for Home Affairs said she accepted she made a mistake.
