A last minute meeting with the EU couldn't save her universally detested deal. Now there's less than three weeks to Brexit – and no one knows what to do.
It now looks increasingly certain that the deadline for a deal will be extended beyond March 29. But what happens after that?
Even if parliament votes to delay Brexit beyond March 29, the EU27 would have to unanimously agree. Would they?
The ongoing policy uncertainty affects both ends of the economy: consumers and producers.
The Labour leader has cautiously backed a fresh vote – and that's all parliament needs to get the debate going.
The Conservative Party might not be able to survive the fallout if May worked with the opposition against her own MPs.
Majority thinks Brussels is playing hardball – but a generational divide is apparent, as so often in the Brexit debate.
Brussels is certainly firm on its red lines, but it's not as intransigent as many in the UK portray it to be.
The question of what to do on the Irish border issue has become more about identity than practicality.
Theresa May is back in Brussels, but how can she get a deal without understanding where her negotiating partners are coming from?
What Brexit means for future UK-Japan business.
It suddenly looks like the party of government has reached a compromise on its long-held divisions over Europe. But it's more an unseasonal warm spell than a complete thaw.
Always just check in with Brussels before you come up with a zany new Brexit plan.
MPs want the prime minister to get back to the negotiating table, but will anyone from the EU be willing to meet her?
Even if there are delays, Britain produces half of the food it consumes and trade with the EU will not stop overnight.
Faced with an intractable problem, bravery is needed. Instead, the only thing on offer is playground politics.
It might have worked at one point, but the atmosphere now is too febrile for this innovation to make a difference.
The prime minister has failed to present anything different to parliament. Here's what could happen now.
Corbyn says he won't talk to the prime minister until she takes no-deal Brexit off the table. But will his gamble deliver the election he wants?
Tips from global conflict resolution on how MPs can find a way to agree on a Brexit deal.