David Davis states that Theresa May will lose her vote on her Brexit agreement on Tuesday and will be forced to return to Brussels for further talks until she receives an acceptable agreement.
Speaking to Sky News, the former Brexit secretary said that the agreement would be rejected because Britain would have meant becoming a "director".
His remarks came when the secretary of labor and pensions, Amber Rudd, urged his party colleagues to support Mrs. May's agreement and warned that rejection would lead to the "chaos" that must be avoided.
Mr. Davis said, "I do not think Mrs. May wins.
"I think the agreement was rejected because everyone of us sees that he leaves us as a director, who gives us as subordinates and does not actually respond to the questions or does not fulfill the promises either in our manifesto or in the referendum.
"I think he will be back in the European Union, I think he will talk to her. I hope they will have substantial talks, we have a lot of ideas about what they could do to improve when we are now.
"The result is that he has to return to Parliament and this time he hopes with an agreement that we will accept".
Mrs. Rudd said that "anything could happen" if the agreement is rejected. "Most of them do not want to," Mrs. Rudd said.
MEPs should consider whether to favor alternatives, including the softer Norwegian-style Brexit option or another referendum where the 2016 result could be reversed, Mrs. Rudd said.
He recognized that Tuesday's vote would be "difficult", but he firmly believed that Mrs. May would remain the prime minister even if her government had been defeated.
The conservative Frontbencher also took a bad turn at his colleagues who would have planned behind-the-scenes battles, arguing that a competition would add "another level of difficulty" to an already difficult situation and would be "a real mistake".
Mrs. Rudd was the prime minister of the government to publicly discuss a "Plan B" if Mrs. May's agreement was rejected.
The Remain that supports Frontbencher said that a so-called Norway Plus model is a "plausible" alternative.
This option would be particularly unfavorable for Brexit supporters, as the United Kingdom would remain closely linked to the EU in the single market and in a customs union.
Ms. Rudd supported the resignation agreement with the ministry's support: "I think it's the right deal for the country.
"I think it will work, but I know it will be difficult because people are still against it."
He added: "The point of discussing other alternatives is to remind people that it is very nice to say:" I do not like the agreement, or I do not like the agreement. "
"What happens if it is rejected? Everything could happen There are many different things that can happen, but most do not want them, so if you think about this arrangement, you must also evaluate the alternatives."
Ms Rudd stated that there was "much support" for the Norway Plus model in subordinates and "some support" for a referendum.
He said: "People should be very clear that they will not vote for the government's resignation agreement if they really prefer these alternatives.
"The resignation agreement that we have made will provide the stability we want, that our company needs, the investment we want".
When the Tory leader's agreement was rejected, Mrs. Rudd said, "Theresa May is a prime minister who will persevere.
In a warning to colleagues who overcame a challenge for the best job, he said: "We are currently in trouble to add another level of difficulty, as this type of conversation would be a real mistake and would not be national interests.
"Nobody knows what will happen next and that chaos must be avoided."
His comments came when critics said that Mrs. May could be forced to resign if her agreement had been defeated.
The head of the former Euro-skeptic party Iain Duncan Smith warned the prime minister and his cabinet, who decided to "shut it down", and said that such an approach was a "disaster".
Meanwhile, Labor leader Jeremy Corbyn said he would think about it UK delay from the EU negotiate a better deal if your party came to power.
"If we go to the government immediately, we will start negotiations immediately, if that meant keeping things a little longer, it was natural," he told Sky News.
Mr Corbyn said that his party was ready to "enter and negotiate" with the EU and would form a minority government "if offered".