I wouldn't get too upset about it. Its unlikely to be voted for by the Conservative and Unionist Party at Westminster. 
At first sight, I would agree, JackM. However, cabinet meeting will be a good guide. DUP vote can be predicted I think as will the votes of people like Boris and Rees-Mogg who are advocating something like Lord Salisbury's policy of 'splendid isolation' in a global economy inclined to favour huge trading blocks like the EU. However, some Tories who have mouthed Brexit lines now have to face real consequence and real parliamentary difficulties. I would be surprised if the Tory number-crunchers haven't done some relatively accurate break-down of how ALL votes across ALL parties might go. Not certain, of course, but enough to have advised May that the DUP are not the 'king-makers' on this issue that they thought they were.
If this deal cannot be accepted then there are only a couple of options left - a people's vote on some final version or a crash-out. Personally, I feel it may well be the 'no-deal' scenario which is not going to do no-one, no good, no way!!
