"Mrs May is a Unionist, she takes a different view".
After suffering a historic defeat in the Commons on her Brexit deal on January 15, May was allowed by lawmakers to go to Brussels and renegotiate a controversial clause in the agreement which sets out rules for future administration of the Irish border.
She also emphasized the government's commitment to the Good Friday agreement, largely credited with ending decades of violence known as "the Troubles" when it was signed in 1998.
The Democratic Unionist Party were the final party to meet Mrs May at Stormont House.
Nissan announced over the weekend that it has decided not to build the X-Trail model at its existing United Kingdom plant in Sunderland, England, cancelling plans announced two years ago after May's government promised to ensure the carmaker's ability to compete after Brexit.
The political situation in the United Kingdom continues to be complicated after the Parliament's firm rejection of the agreement negotiated by Prime Minister May with the European Union.
Varadkar said that in a "frank" exchange with May last week, he told her that the backstop was required to ensure a future government did not "abrogate" the insurance mechanism.
Former foreign secretary Boris Johnson accused the Tory leadership of using rumours of an early election as a "scare tactic" to bounce exhausted Conservative MPs into backing her Withdrawal Agreement.
"More than ever this has demonstrated why we need to be part of an global treaty that a prime minister, parliament or government of the day can not abrogate it".
The UK's labyrinthine crisis over European Union membership is approaching its finale with an array of options including no-deal Brexit, a last-minute deal, a snap election, or a delay.
Nobody in the European Union is considering offering legally binding assurances to help Theresa May get her Brexit deal through Parliament, a senior Brussels official has said.
Theresa May has already had conversations with business and community leaders during her two-day trip to Belfast.
"From a political point of view, there is still time", Merkel said.
"What we need now, and the only lines we are interested in, are black and white on paper, an actual deal". This is about people being able to do their jobs, it's about workforce planning in our health service, in our schools, it's about all of those things.
He said he had concerns about the idea of "alternative arrangements" and that it could not result in the "deletion" of the backstop, while Mr Juncker said the backstop was needed for "obvious, vital reasons" and it could not be abandoned.
The border between the Irish Republic and Northern Ireland will be the UK's only land border with the European Union after Brexit, now scheduled on March 29.
"It just doesn't add up".
Mrs May's spokesman insisted: "She is absolutely determined to deliver Brexit on time".
"We made it very clear that there are no alternatives to the backstop".
As the party that negotiated the Good Friday agreement, which brought peace to Northern Ireland, the Labour Party has a solemn duty to be responsible in our approach to the effects of Brexit on Northern Ireland and the Good Friday agreement - no matter how great the desire to see a change in government, we can not forget our responsibility to the peace process and to protecting its integrity.