Most Welsh MPs are expected to unite against the prospect of a no-deal Brexit ahead of an expected showdown in Parliament.
On Tuesday evening, MPs will vote to control of Commons business to allow them to discuss proposed legislation to block a no-deal.
Labour and Plaid Cymru, amongst other MPs, said they wish to stop the UK from leaving the EU without a deal on 31 October.
If they succeed, the PM has vowed to push for a snap general election, which would be held on October 14.
Jeremy Corbyn has said he "fully expects" no-deal Brexit prevention legislation to be passed by Parliament.
A new election would require parliament's approval, but pro-remain MPs like Cardiff Central MP, Jo Stevens said the priority this week is "to stop a no- deal Brexit."
When questioned whether she thinks there is enough time, she said "the entire focus and entire discipline of democrats in parliament must be to stop a no-deal Brexit."
She also said that she preferred to refer to so-called Tory rebels as "democrats".
She said Tuesday's vote in the Commons is about "people who have been elected by the public to make decisions on their behalf."
If MPs agree on Tuesday to allow the cross-party group to seize control of Commons business, the legislation will be considered the following day.
But it is not only Labour who have warned of the danger of a no-deal Brexit.
Plaid Cymru said there priority is also to stop a no-deal Brexit - and a "Brexit altogether."
Under the terms of the European Union (Withdrawal) (no 6) Bill, the Government must seek a delay to the UK’s withdrawal from the EU until January 31 if there is no agreement with Brussels in place by October 19 and Parliament has not approved a no-deal Brexit.
But if his plan does not succeed, the UK government is expected to table a motion to hold a general election next month.
Boris Johnson said if anti-deal MPs win the vote, it would make life "impossible" in getting a deal through with the EU.
The prime minister said it would "hold us back" if Brussels believed MPs would back a "pointless delay" to Brexit and warned that MPs would "chop the legs out" from the UK position if they backed a Brexit extension.
Analysis from ITV News Wales Political Reporter, Owain Phillips
Events are clearly moving quickly, and the whole decision to prorogue Parliament has accelerated the political battle around a no-deal Brexit.
Boris Johnson has forced the issue quicker than anticipated. Potential rebel Conservative MPs have to decide between backing the prime minister or stopping no-deal and cutting short their political futures.
Many Conservatives hoped it wouldn't come to this, but in truth it has and enough are willing to choose the latter. Boris Johnson has failed to force the rebels into line. The only option left is to appeal to the voters and pitch a snap election as him against Parliament.
But there's an old adage in politics that voters don't like needless elections. Just ask Boris Johnson's predecessor. Theresa May tried, and failed, at the same tactic.
A Boris landslide is no foregone conclusion.