Michael Gove, who campaigned for Brexit in 2016, said that if May lost Tuesday's vote then it would effectively lose control of Brexit.
"MPs were clear that legal changes were needed to the backstop".
The British government has announced plans to scrap import tariffs temporarily on a wide range of goods in the event of a no-deal Brexit, to limit the economic damage.
Mrs May is now buoyed by the new arrangement where the United Kingdom could replace the backstop with a new deal by December 2020 - the end of the transition period with the EU.
The United Kingdom's tortuous crisis over European Union membership is approaching its finale with an extraordinary array of outcomes still possible, including a delay, a last-minute deal, a no-deal Brexit, a snap election or even another referendum. The EU could not, under the new terms, continue to apply the Irish backstop indefinitely without the United Kingdom reserving the right to legal redress.
What are newspapers saying ahead of the crucial vote on Brexit?
The general secretary of steelworkers" union Community, Roy Rickhuss, said: "The Government's plan for zero tariffs would be a fresh betrayal of British steelworkers, putting further pressure on their jobs at a hard time for the industry'. It sets out the $50 billion divorce settlement that Britain would pay; it allows for a two-year transition period, when things would remain essentially as they are now in terms of trade, migration, security and travel; and it seeks a guarantee to preserve the free and open border on the island of Ireland.
Though there are two more votes scheduled, European Commission President, Jean-Claude Juncker, warned that there would be the UK's deal with the EU would be the final one before March 29.
Meanwhile, the Opposition Labour Party has been mounting pressure on the government for an official update to Parliament on the talks with the EU. Dutch Prime Minister Mark Rutte said in a Twitter message that he was "pleased with the agreement", adding: "An orderly #Brexit is crucial for both the European Union and the UK".
May survived a Conservative Party vote of no-confidence in her leadership in December and can not be challenged again that way for a year.
"Today's announcement does not resolve the devastating effect a no-deal Brexit would have on the automotive industry", said Mike Hawes, chief executive of the Society of Motor Manufacturers and Traders (SMMT). It is irritated, too, that Britain is seeking changes to an agreement that May herself helped negotiate and approve.
The British leader has spoken by phone to eight European Union national leaders since late last week, including French President Emmanuel Macron and German Chancellor Angela Merkel, without any sign of a breakthrough. "There will be no third chance, there will be no further reassurance on the assurances if this deal fails", Juncker said. "I really think if there is going to be an extension it has to be with a objective, that extension".
The last-ditch bid to make progress in talks, which Downing Street admitted overnight were "deadlocked", comes amid predictions that the Prime Minister is headed for a second humiliating defeat on her Withdrawal Agreement unless she can secure legally-binding changes to its controversial backstop. "It's staggering that we are in this position with only days until we are due to leave".
May's deal was rejected January 15 by a majority of 230 votes in the parliament, giving the prime minister the worst defeat for a sitting government for decades.
Commenting on the matter today (Wednesday, March 13), senior director of MII Cormac Healy said: "The fact that the political disarray is driving us in the direction of this cliff-edge Brexit is a real concern for our export business".
- Partey ineligible for Atletico clash against Juventus
- Key student striker rejects Leo's support until urgent climate action taken
- 3-story building collapses in Nigeria with children inside
- David Beckham pranked by James Corden at LA Galaxy 'statue' reveal
- Fox News condemns its own host over comments about congresswoman's hijab
- Family Upset After a California Hospital Uses Robot to Deliver Death Prognosis
- As New York probes business deals, Trump tweets 'HARASSERS'
- Solskjaer: The text which led to Man Utd return
- Jussie Smollett struts into court for hearing about allowing cameras in courtroom
- DeSean Jackson Returning to Eagles After Buccaneers Agree Trade