Comment by makomk

May's deal permanently blocks the UK from ever fully leaving the EU without the EU's permission, meaning that anyone who wants to leave won't support it. It also removes almost all the benefits of remaining in the EU, meaning Remain supporters hate it too. Oh, and for bonus points it effectively makes Northern Ireland no longer fully part of the UK, meaning that the DUP (the Northern Ireland unionist party which the Tories have to ally with to get a majority) will never support it. There are other issues with it too, of course, but that's the general gist.