Votes forced her ministers to reveal their legal advice and also, crucially for Britain's future, give MPs a say on what happens next if they vote against her flawed deal.
Boris Johnson called for the backstop to be "junked" as he warned that the draft Brexit deal was in danger of turning Northern Ireland into an "economic semi-colony" of the EU. May stressed in an interview with the BBC that it would be up the U.K.to decide whether to trigger the backstop and that one way to ease the concerns of lawmakers would be to let Parliament make this decision.
"I've been speaking to factory workers in Scotland, farmers in Wales and people right across the country, answering their questions about the deal and our future".
She will tell MPs: "The British people want us to get on with a deal that honours the referendum and allows us to come together again as a country, whichever way we voted".
The PM later said the Brexit debate had been "corrosive to our politics".
Mr Dodds says if ratified the deal would be an global legally-binding treaty, which would place a customs and regulatory border between Northern Ireland and Great Britain contrary to previous pledges from Prime Minister Theresa May. May says the withdrawal agreement will not be reopened, echoing European Union leaders who want the issue settled as Brexit looms in March. And they must do so under huge pressure from both sides of an emotive issue that has divided the nation and the two largest political parties.
"The backstop is talked about as if it's automatic".
Attorney General Geoffrey Cox was even facing the prospect of being suspended from Parliament over his refusal to publish the advice.
After a string of humiliating parliamentary defeats for Mrs May the day before cast new doubt over her ability to get a deal approved, USA investment bank JP Morgan said the chances of Britain calling off Brexit altogether had increased.
The paper reported Cabinet ministers have also warned Mrs May she would have to stand down if the deal is defeated and she fails to secure better terms from the European Union. "And they need to really grasp and understand that", she told reporters.
"I will therefore be voting against this deal and will be trying to ensure Brexit is properly and fully delivered".
"But there isn't anything, I don't believe, that is better". The formal advice from a European Court of Justice advocate general - not binding but usually heeded by the court - suggested to some lawmakers that revoking the "Article 50" divorce notice was an option.
Mrs Leadsom, who had been reported to have been leading intra-Cabinet attempts to get Mrs May to change the deal agreed with Brussels after months of hard-fought negotiations. A top adviser to the court earlier this week issued a non-binding opinion that the United Kingdom can unilaterally revoke its decision to leave.
Opening the debate on the Brexit deal, Mrs May said: "I know there are some in this House and in the country who would prefer a closer relationship with the European Union than the one I'm proposing, indeed who would prefer the relationship that we now have and want another referendum".
"These people would have to make up their minds - do they still believe in a second referendum, or do they believe its a lost cause", Cleppe said.