Britain's Conservatives have been divided for decades over Britain's membership in the European Union, and the draft withdrawal agreement has infuriated the most strongly pro-Brexit members, who want the country to make a clean break with the bloc.
"These next seven days are going to be critical, they are about the future of this country", Prime Minister Theresa May told Sky News on Sunday.
"A change of leadership at this point isn't going to make the negotiations any easier and it's not going to change the parliamentary arithmetic".
May insisted she hasn't considered quitting as furious Conservative rebels try to gather the numbers to trigger a no-confidence vote.
Friday brought some respite, as supportive Cabinet ministers rallied around her.
The DUP, among others, objects to the highly contentious "backstop" part of the text, an insurance policy to keep the border between Ireland and Northern Ireland open if no trade deal is reached.
"And it remains the UK Government's intention that Gibraltarian financial services firms continue to have the access to the UK they have today and that any disruption is avoided". Instead, Mr Barclay - who supported Leave in 2016 - will focus on the domestic legislation to prepare Britain for its scheduled departure in March.
Meanwhile, the Democratic Unionist Party, which props up May's minority government, say they intend to oppose the deal because of the "backstop" mechanism agreed to by May would mean additional checks on goods passing between Great Britain and Northern Ireland.
May also said she would meet European Commission Jean-Claude President Juncker in Brussels in order to specify the conditions of the Brexit agreement.
European Union leaders are set to discuss the draft at a special summit in Brussels on November 25.
"The withdrawal agreement we have been presented with is unacceptable to leave and remain voters alike".
Defence Minister Tobias Ellwood, a Government loyalist and MP for Bournemouth East, said: "I fully recognise the call for a people's vote in relation to honouring the will of the people, which may well be different now than it was in 2016". This is the option being pursued by the Labour leader Jeremy Corbyn who believes he can put enough pressure on May to force her to go back to the country if she is unable to get support for her deal from MPs.
Mr Raab, who stepped down as Brexit secretary on Thursday saying he could not accept the terms of the deal done by the Prime Minister, told the Sunday Times the United Kingdom should demand an agreement that allows it to unilaterally leave any customs union.
"I still think a deal could be done but it is very late in the day now and we need to change course", Raab told the BBC.
"The biggest risk of no deal is taking a bad deal to the House of Commons ... it is very important to take the action now".
Mrs Theresa May rolled the dice with a dramatic reshuffle of her ministerial team as she battles to cling on to her job and stop her own Conservative Party from tearing up her Brexit deal. He said that was a priority ahead of pushing for a so-called people's vote on the final agreement. "What's the question going to be?"