Is Vince Cable going to run for Mayor?
David Morden (which may or may not be his real name) has posted a highly intriguing story in the comments on my last blog (which he has also posted on Labour List).
He suggests that people in Downing Street have been overheard discussing the idea that the Lib Dem Business Secretary should be encouraged to run for Mayor of London. As a coalition candidate, he implies.
What a neat, clever, wheeze, for, as David Morden suggests, it would use "one stone" to kill several birds.
First, it might resolve the Vince problem. Cable is widely thought to be deeply unhappy in his new job as Business Secretary.
Second, it would resolve the Lib Dem problem of finding a decent candidate for Mayor.
Other names in the frame are said to be Lembit Opik, Duwanye Brooks, and the recently ennobled former TV presenter Floella Benjamin, none of whom is likely to be a winner.
And - whisper it gently - it could solve the Boris problem, or at least to some extent.
Boris Johnson has yet to confirm he's running again, and with the government likely to be pretty unpopular by May 2012, he may prefer to give it a miss and get back to Westminster.
And it might help cement the coalition, though perhaps undermine Simon Hughes's claim yesterday that there would be no election pacts between the Liberal Democrats and the Conservatives.
UPDATE at 17:11: On the Cable for Mayor theory, a Lib Dem minister has just texted me: "I can't see Vince wanting to be Mayor! Or indeed wanting to stand for Mayor!"