Could the evidence John Kerry has just revealed could it have swayed a few, or could better party management have swayed others? The Government only lost by 13 votes.
President Obama and the Prime Minister spoke by phone just under an hour ago.
The President was reassuring the Mr Cameron that the Americans saw this really as a single issue and that it would not sour the rest of the relationship, but what one insider told me this afternoon will really hurt - is the sight of the French acting with the Americans as this plays out.
International Development Secretary Justine Greening claimed she missed the crucial vote on Syria because she did not hear the division bell
Britain's place in the world changed with last night's Commons vote on Syria, as David Cameron spectacularly misread his own party.
It was clear the majority of MPs would not be prepared to back unilateral action by the US and Britain. Today we need to make clear why.