Theresa May has given it her best shot. It is hard to see anything else she could have done to make Brexit work. The game-changer of the last few weeks has been the sheer level of parliamentary dysfunction. It’s now clear that Brexit can’t happen on 29 March because of the sheer volume of legislation to be handled between then and now. If it can’t handle that, it has no chance of the sort of wise restructuring of our arrangements that would be needed for any form of Brexit to have even half a chance of working, and it has no chance of the tough decisions having widespread public support — particularly when they hit the jobs and prospects of people who voted Leave.
Under normal circumstances, when a government has lost credibility it would be time for a General Election. But right now, our two biggest parties are both deeply split. Neither can put forward a manifesto that’s more than an awkward compromise, so neither could form a credible government.