The BBC leads most of its bulletins this morning with the story that Gordon Brown has committed himself to a replacement for Trident if he becomes Prime Minister.
Some appear to be wondering why this is a story at all. Surely it's just a senior Government minister making clear that he supports existing Government policy?
Well, I reckon they're missing the point. The reason this is a story is because there are quite a few people out there in the Labour Party who thought, perhaps naively, that Prime Minister Brown might turn out to take a different view on the replacement of Trident and other nuclear-related matters.
What I think is really interesting about this story - and no-one really seems to have picked up on this yet - is that it makes a Labour leadership challenge from the anti-nuclear, Meacherite left an absolute racing certainty.
Now here's the rub. Until now, it has been generally assumed that Mr Brown wanted an uncontested election, or an "orderly transition" as it is usually described.
I reckon that's wrong, and that the Chancellor has decided he would benefit much more from a contest in which he can define himself as the natural inheritor of the New Labour mantle in opposition to a challenge from the old left.
By making clear his views on Trident at this early stage, he has given the left the perfect cause on which to mount such a challenge - perfect both in the sense that their feelings about nuclear weapons make it inevitable that they will take it up, and in the sense that it portrays Brown as in touch with mainstream opinion in the country.
All Gordon has to worry about now is whether the Blairites will be convinced by this display of loyalty, or whether they will, in the end, decide to run Alan Johnson against him.
Update 1: Clare Short has now made my point for me, by saying she will no longer support Gordon Brown for the leadership, and that there should be a contest.
Update 2: My most recent column looking at the Labour leadership issue, written earlier this week, is published today in the North West Enquirer.
Update 3: Ben Rooney has included this post in today's Guardian round-up of what's on the web - the second time this blog has been featured!