Is it unreasonable to ask whether Lucy Powell, as Deputy Leader of the Labour Party, should now account for the role she is alleged to have played in the removal of Sir Keir Starmer?
If she actively encouraged Members of Parliament to withdraw their support from the elected Leader, or otherwise facilitated Andy Burnham's accession to the leadership, then it is surely legitimate for Labour members to ask whether such conduct is compatible with the responsibilities entrusted to the holder of the Party's second highest office. If there is evidence that the Party's rules have been breached, then those matters ought to be examined through the Party's established disciplinary procedures, impartially and without favour.
More fundamentally, however, there is the question of political legitimacy.
The Deputy Leader occupies a unique constitutional position within the Labour Party. That office exists not merely to exercise influence, but to support and uphold the leadership entrusted to the Party by its members. Where a Deputy Leader is perceived to have participated in, or acquiesced to, the removal of that elected leader, confidence in the office itself is inevitably called into question.
For that reason alone, there is a compelling constitutional and democratic argument that Lucy Powell should seek a renewed mandate from Labour's membership. If she remains persuaded that her actions reflected both the interests and wishes of the Party, she should have no hesitation in submitting herself to the judgement of those who elected her.
Such a contest would serve a wider purpose. It would provide Labour's membership with their first genuine opportunity to express a view upon the manner in which the Party's leadership changed hands. Should Ms Powell secure a renewed mandate, her authority would be strengthened accordingly. Should she fail to do so, the outcome would inevitably be interpreted as a verdict not merely upon her own position, but upon the process that elevated Andy Burnham to the leadership.
Political parties rightly speak of accountability, transparency and democratic legitimacy. Those principles should apply no less within their own ranks than they do in government. If Labour believes in those values, then there is every reason why its Deputy Leader should now seek the explicit confidence of the Party's membership. Anything less risks leaving unanswered questions that will continue to cast a shadow over both her office and the circumstances surrounding the Party's change of leadership.
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@TomMcTague at
@NewStatesman Politics Live event today - I talked about how we use this moment to drive culture change in the Labour Party so that we listen, respect and value the contribution of our whole movement not just one part of it.