One of the likely promotees in the coming reshuffle of the Turnbull ministry is Dan Tehan, member for the Victorian seat of Wannon. If Tehan joins the frontbench, that creates an interesting problem in regard to his current position, as head of parliament's Joint Committee on Intelligence and Security.

Tehan has been a mixed bag as chair of the committee. Under him, Labor's push to expand the remit of the committee and make it more than a glorified estimates committee for spooks has resulted in the committee's functions and importance increasing significantly, and Tehan deserves credit for that. But he has also, entirely inappropriately, undermined perceptions of the committee by spruiking national security legislation that the committee would then go on to review, casting doubt on whether the committee was truly considering the expansions of counter-terrorism agency powers that came before it, or merely rubber-stamping them.