The government has promised lawmakers a vote on the final deal, but the issue at stake is what happens if they reject it. Pro-Europeans want to ensure there is some way of holding the government to account in what would be a crisis situation.
"And part of that has got to be where, if (EU negotiator) Michel Barnier tries to give us a very bad deal, that she can turn around and say "no, I'd rather not do that".
May's Conservative Party does not have a majority in the Lords, and was expected to lose after compromise talks with rebel MPs broke down last week.
TORY rebels could cause the government to collapse in a future vote on a "catastrophic" Brexit, ex-attorney general Dominic Grieve has said.
That would tee up a showdown in parliament's directly elected chamber on Wednesday which will be crucial for May's attempts to resist a move seen as a step towards a softer Brexit, meaning closer ties to the European Union on issues likes customs and regulation.
Leading pro-EU Conservative Dominic Grieve told the Press Association: "It is unacceptable in my view". And I assure you I wake up at 2am in a cold sweat thinking about the problems that we have put on our shoulders. "The difficulty is that the Brexit process is inherently risky".
"But we need to make sure that parliament can't tie the government's hands in negotiation and can't overturn the will of the British people".
An added risk for the rebels is that if May does fall, it could open the door for an arch-Brexiteer to take over.
Notwithstanding her battles with backbenchers, May has rejected claims that divisions within her cabinet on the way forward were making negotiations with Brussels harder.
"We will be free to negotiate those trade deals around the rest of the world".
Mr Buckland stressed that while Tory rebels argued the vote they wanted would only be advisory, he stressed that even this vote could have a political effect and send a signal to Brussels that the UK Government was not in control of its own negotiating strategy. Despite the stuttering progress in the talks with Brussels, both sides still hope to reach a deal in October.
In what threatens to be a bloody round of "parliamentary ping-pong", amendments backed by the Lords will bounce back to the Commons on Wednesday.
The amendment drawn by the United Kingdom government speaks of merely an advisory rather than a meaningful vote.
"Theresa May's plans are nothing if not breathtaking in their arrogance and deceit", said Dick Newby, their leader in the Lords.
Peers are now to debate the Government proposals on Monday, along with a rival amendment tabled by Lord Hailsham, which revives Mr Grieve's proposal for MPs to be enabled to direct the Government on what to do if no Brexit deal has been secured by February.
"Parliament must be given a meaningful vote on all possible outcomes of Brexit - and this must be guaranteed in writing".
The EU (Withdrawal) Bill would formally end Britain's membership of the bloc and transfer more than 40 years of European law on to the British statute books.
Gerard Pique: Cristiano Ronaldo prone to diving Spain ultimately controlled much of the game and can chalk up two of the goals conceded to uncharacteristic individual errors. Spain struggled to contain Portugal's counterattacks, but it showed it remained a solid team despite Lopetegui's absence.
The second half started much the same as the first, with the English pinning the Tunisians back inside their own half. I think there could have been a couple of penalties, especially when you look at their one.
The Liverpool forward, who scored 44 goals last season, has had his fitness for the tournament in doubt since the showpiece match. Russian Federation leads Group A on goal difference after beating Saudi Arabia 5-0 on Thursday in the tournament's first match.
In a day that may have otherwise been remembered for the playing conditions, Mickelson provided a weird and unexpected moment. The incident on Mickelson's 48th birthday brought to mind a similar episode by John Daly at the 1999 U.S.
The Saudi Arabia team promise to be a good match for the hosts as they have enjoyed a slightly better form than their opponents. Subs: Hatan 6, Fahad 6, Muhannad 6. 21' - But here come Saudi , Yasser nashing down the left and crossing well into the middle.
The children are only allowed two hours a day for outdoor activities and spend the rest of their days inside a former Walmart . Vitiello said the policy is meant to deter families of immigrants from coming to the U.S.
Sri Lanka captain Dinesh Chandimal has been charged with ball-tampering by the International Cricket Council (ICC). The West Indies resumed on day three on 118-2, which was bumped up to 123/2 by the penalty runs.
Giuliani also predicted that Strzok would be in jail in the coming days. "And if you read the report, you'll see that". And Comey said had he known earlier about the laptop's import, it might have affected his decision to notify Congress.
President Donald Trump makes remarks at the Prison Reform Summit at The White House in Washington, D.C., May 18, 2018. Implementing the policy exclusively for deterrence purposes, however, has been ruled illegal by US judges.
John Garcia said he was just leaving the courthouse when he heard gunshots, and he and others were quickly told to go back inside. One of the mortally wounded deputies managed to shoot the suspect, who remains hospitalized.
5 killed in SUV crash during chase in Texas
Footage of the crash showed four bodies on the ground, the charred Chevrolet and several Border Patrol vehicles at the scene. Boyd told WOAI a wall needs to be build because illegal immigration is "a real problem" in the area.
Samsung Chromebook Plus (V2) costs $500 with built-in pen
So besides the front-facing 1-megapixel camera , you also get a rear-facing 13-megapixel shooter with f/1.9 and autofocus. It is a 2-in-1 portable device that can convert into a touchscreen tablet simply by folding the laptop by 360 degrees.