Well the Windsor Agreement - Sunak’s big gamble.
The question is - will the DUP and the ERG get on board, or will they shred Sunak, just as they have done previous prime ministers?
Sunak knows almost certainly that if he takes the Agreement to a vote it will go through, as Labour are assisting Sunak in this gamble, but there appears to have been little schmoozing done by Sunak towards the two protagonists, and this may be the biggest bit of the gamble - Sunak has done the detail, but not the politics.
The DUP know that in the final analysis that they cannot rely on people like Johnson or Mogg because however much Johnson claims to be supporting the DUP etc. he will happily throw them under the bus if it suits his game, just as he did in the protocol.
So as I have said - this week is going to be interesting. Will the DUP accept that it is the best they can get? Will the ERG decide that they have little support in the country and call it a day?
Or will they fight Sunak tooth and nail and decide that this is the last stand and the hill that they will die on?