The latest People's Vote march.
In another blow to May, two dozen Conservative lawmakers voted with the opposition Tuesday to force an amendment to Brexit plans that gives lawmakers more say over what happens next if the deal is defeated in Parliament.
The second option on the table would be a softer Brexit option to win over some Labour MPs and Tory Remainers.
Conservative Craig Whittaker was the only one backing Mrs May.
While May recognized the criticisms of the current deal, she argued against scrapping it.
Hitting back, Barnier said: "I do not see this humiliation to which you refer".
The EU might also establish a border between the Republic of Ireland, an EU member, and Northern Ireland, which is a part of the United Kingdom of Great Britain and Northern Ireland.
He said that nobody wanted a no-deal Brexit but time had been wasted by the Prime Minister "going down a path that she must have known weeks ago couldn't command a majority in Parliament".
Angela Merkel's party choosing successor to longtime German leader
Kramp-Karrenbauer said she wants to ensure that the CDU avoids the fate of shrinking center-right parties in France and elsewhere. More generous family leave, an exit from nuclear power and an end to military conscription were among her signature policies.
Shadow Brexit secretary Labour's Keir Starmer said the advice revealed the "central weaknesses" in the government deal. If May's deal doesn't get through, and I don't think it will, I don't think that is sort of revelatory news.
"Theresa May's deal is at this point little more than a hypothetical exercise, with all sides of the House of Commons determined to defeat it on Tuesday. It mustn't happen. Scotland needs and deserves better than the Prime Minister's blindfold Brexit".
Mr Davies (Shipley) was equally scathing: "The deal doesn't even come close to respecting the result of the referendum, even by the criteria set out by the PM herself". I don't think a second referendum is either.
It seems to confirm the fears of opponents of May's deal that the backstop would tie Britain indefinitely to European Union rules, despite leaving the 28-member economic bloc. "MPs, who are not trained lawyers, need to be fully aware of the implications and ramifications of the Brexit deal from a legal perspective".
As investors and allies tried to work out the ultimate destination for the world's fifth-largest economy, the Northern Irish party that props up Mrs May's government said legal advice about the deal was "devastating". It buys a few months of stability but effectively kicks all the hard decisions about our relationship with Europe down the road. "There are years of discussion and debate ahead".
"It would be much better to have firm arrangements in place now. It's time for a new approach and to look at the real alternatives - whether that be a second referendum giving Scotland the opportunity to remain in the European Union, or the compromise proposal of staying in the single market that the Scottish Government unveiled two years ago".
The parliamentary arithmetic is still against the Government ahead of next week's withdrawal treaty vote.
A defeat for the prime minister next week could trigger a no-confidence vote leading to early elections, leaving the Brexit process in chaos.
The alternative, according to the deal struck between May and the European Union, would be to extend the transition period for up to two years, during which time Britain would largely enjoy the same relationship with the bloc, despite officially leaving on March 29, 2019.