If federal parliament wasn't already at a low ebb in terms of credibility with the electorate before Tuesday, courtesy of the citizenship debacle, Stephen Parry made sure it got there with behaviour so ridiculous it left even his colleagues bewildered and the Prime Minister fuming. Parry, informed by the Home Office that he had British citizenship, resigned from politics yesterday afternoon, his apparent plot to be rescued from embarrassment by the High Court having been dashed last Friday.

Turnbull made his anger clear in his public remarks in Israel: "I'm disappointed that Senator Parry didn't make public this issue, this issue some time ago, quite some time ago ... he should have reported it much earlier." Damningly, he said, "I learnt about it probably about the same time you did on Tuesday, yesterday."