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Is Catherine West, the backbench MP for Hornsey and Friern Barnet, the woman who is going topple Keir Starmer and see a seismic Labour victory unravel just two years in?
It's by no means impossible.
MPs are angry. Some believe she could get the numbers out of sheer disgruntlement. One tells me: "What have we got to lose?"
The 81 names she needs to get on the ballot paper to become the next prime minister would be a tall order for a relatively unknown MP.
But to launch the race, she doesn’t actually need the numbers, she only needs to inform the NEC tomorrow. Things could unravel from there.
Wes Streeting, whose allies say he is not "plotting" but "planning" just in case, does not want to be first over the top. But could he launch a bid if it looks like events are moving in that direction?
Angela Rayner, for now, is eerily silent. Both will be weighing up where this West business goes over the coming days and how it frames any potential leadership challenge. There is a distinct possibility no one moves and West becomes a footnote in political history.
You may not immediately recall the name Anthony Meyer. He was the little-known backbench MP who challenged Margaret Thatcher for the leadership in 1989. She won overwhelmingly, by 314 votes to his 33, but the moment sparked something. The prime minister, challenged again a year later by Michael Heseltine, was gone within 12 months.
John Major survived the "put up or shut up" leadership challenge in 1995. Jeremy Corbyn won decisively when challenged by Owen Smith in 2016. Both men, however, were booted out by the electorate not long after.
The prime minister hopes to rally the troops with a rousing speech tomorrow. Will Starmer have the rhetorical flair to revive his weary party?
Allies point to his conference speech after the bruising 2021 Hartlepool by-election, when he declared "my dad was a toolmaker", a speech widely seen to have saved his leadership.
A number of MPs and ministers tell me what they want to see is policy.
Downing Street is pointing to Europe as the new dividing line, and we are likely to hear more about that in the coming days. But can the prime minister really talk about change within the limits of his red lines on the customs union and single market? Not to mention that on Brexit, immigration and so much else, Labour MPs want very different things.
Or will West unravel Starmer’s plans for a reset before they have even begun?
It’s going to be an interesting week.