With May dead-set against a second referendum, and the opposition Labour Party not committed to one (but not ruling one out), a second referendum would need either a change in prime minister, a change in government, or an abrupt change in policy. May will meet with her cabinet ahead of the vote, and may be called on to resign, given the scale of the defeat. A new referendum can be called only if it is approved by parliament.
If Corbyn wins the vote and a new government can not command the support of the majority of MPs within 14 calendar days, parliament is dissolved and a general election is triggered. "Nothing about how, if even, it intends to honour the British people's decision", May said.
The vote plunges the already divided country deeper into turmoil as it tries to solve several key issues in the Brexit process.
Their intervention comes after May's last-ditch attempt to get her MPs to support the deal, which is widely expected to be defeated in Tuesday's "meaningful vote".
Some of the hardline Brexiteers, including former Foreign Secretary Boris Johnson, former Brexit Secretary David Davis and staunch Remainer MP Anna Soubry, openly said they would reject the deal. Labour legislator Tulip Siddiq delayed the scheduled cesarean birth of her son so she could attend, arriving in a wheelchair.
Two and a half years after the referendum, Britain remains divided over how, and whether, to leave the EU.
Pro- and anti-Brexit campaigners rallied outside parliament as the last day of debate kicked off around 1300 GMT. One group waved blue-and-yellow European Union flags, the other brandished "Leave Means Leave" placards.
Try again: The British government and European Union leaders say their agreement is the best compromise available, and despite her landmark defeat, May said on Tuesday it remained the only option.
"That is why I believe that the agreement is as it stands and will not be substantially changed, but that, if things go wrong tonight, there will certainly be talks again".
On Monday, she asked MPs to "give this deal a second look" before the key vote.
May, who leads a fragile Conservative minority government, has made delivering Brexit her main task since taking office in 2016 after the country's decision to leave the EU.
The deal was originally scheduled for a parliament vote in December, but due to strong opposition, May postponed it to January 15.
As their nation's fate was being decided, hundreds of noisy supporters and opponents of Brexit, some banging drums and others driving floats with huge dolls mocking top United Kingdom politicians, rallied outside the ancient parliament building in London. Economists warn that an abrupt break from the European Union could batter the British economy and bring chaotic scenes at borders, ports and airports.
In the 30 years before it was signed, clashes between unionists and republicans - known simply as the Troubles - took the lives of more than 3,600 people.
"If a deal is impossible, and no one wants no deal, then who will finally have the courage to say what the only positive solution is?" Associated Press writers Danica Kirka in London and Frank Jordans in Berlin contributed.
LeBron plays it safe tonight with a "There Is No Magic Pill" hat for tonight's game in Los Angeles for Rams-Cowboys. James showed up to Saturday's Cowboys-Rams game at the LA Memorial Coliseum, but he wasn't rocking any Dallas gear.
Springfield's State Journal-Register reports the state capital broke a 55-year record for daily snowfall on Saturday. Forecasters said heavy snow could fall in mountain areas, such as Charlottesville and Staunton, Virginia.
It was revealed by Synamedia at the event that nearly 26 percent of millennials share their Netflix account with others. Software maker Synamedia said that the artificial intelligence system looks for potentially fraudulent activity.
The Zimbabwe Association of Doctors for Human Rights said 13 people had sustained gunshot wounds in and around Harare on Monday. Mnangagwa addressed the recent protests in Zimbabwe , which had begun on Monday after the government doubled fuel prices.
A positive review of her role in a revue show in NY convinced her to ditch education in favour of full-time performing. Channing stars in the revival production of Hello, Dolly! at the Lunt-Fontanne Theatre in New York City in March 1978.
Arsenal will move level with four-placed Chelsea with a victory over West Ham United in Saturday's early kick-off. Emery has been boosted by the return to full training of Nacho Monreal , Shkodran Mustafi and Héctor Bellerín.
The Australian tennis pair of Bernard Tomic and Nick Kyrgios have become well known for their moments of madness. What we might get is an indication of where each player is at just days out from the Open.
Carlisle said GM is using Tesla's vehicles as a benchmark while the Detroit-based automaker develops its own electric versions. In the same weekend that the electric transition promise was made, a three-row, highly-connected EV crossover was unveiled.
The TSA is part of the Department of Homeland Security, which is the largest federal agency affected by the partial shutdown. Department of Justice, which defends the federal government in court, did not immediately respond to requests for comment.
Baby boy or girl? It seems Harry and Meghan don't know yet
Fortunately for them, Meghan Markle chose to answer that question while greeting the crowds in Birkenhead, England earlier today. For the latest outing, a heavily pregnant Meghan stepped out in a vibrant red coat from Canadian brand Sentaler .
Jayme Closs Has No Link to Suspected Kidnapper: Granddad
The discovery ended an all-out search that gripped Wisconsin , with many people fearing the worst the longer she was missing. As an example, Fitzgerald said Patterson shaved his head to avoid leaving any hair as evidence during the assault.
No movement in settling record-long shutdown
President Donald Trump says he's at the White House waiting for Democrats to return to Washington and help end the shutdown. The courts did not allow President Harry Truman to nationalize the US steel industry during the Korean War.
Syria: US starts pulling equipment but not soldiers
US Colonel Sean Ryan, a coalition spokesman, said the coalition "has begun the process of our deliberate withdrawal from Syria ". Kurdish allies the YPG in Syria as one and the same with the PKK, a group that has waged a 34-year insurgency against Turkey.