"And I want to say on behalf of the Irish government and behalf of the Irish people, that we thank the Friends of Ireland caucus in Congress for their vital help at this critical time to protect the provisions of the Good Friday Agreement and ensure there is no return to a hard border on the island of Ireland, whatever happens with Brexit".
"I think we have to take a look seriously whether or not the United Kingdom is allowed to trade. Maybe I shouldn't let you do it, I'll just get you in trouble".
The United States and Ireland are bound together with ties of kinship and friendship, U.S. president Donald Trump has said.
Trump also lamented he was "surprised at how badly it has all gone from the standpoint of negotiating".
Trump, who holds himself up as a master deal-maker, said he had given Prime Minister Theresa May his ideas on how she could negotiate a successful deal for leaving the 28-member group of nations.
The US President said Brexit is "tearing countries apart" but it would be unfair to hold a second referendum.
"I think it could've been negotiated in a different manner, frankly".
Leo Varadkar is in America as part of the annual St Patrick's Day celebrations in Washington DC.
MPs are set to vote on Thursday evening on whether to request a delay until at least June.
"I hate to see it being, everything being ripped apart right now". On Thursday, two weeks ahead of the scheduled departure from the EU, British lawmakers overwhelmingly backed May's motion to extend the Brexit deadline amid disagreements over the withdrawal plan.
Speaking about the contributions of Irish-Americans, Pelosi quoted Republican President Ronald Reagan as saying USA leadership would be lost "if we ever close the door to new Americans". Varadkar said he appreciates what the president has done for his country economically.
Pence tweeted that he was honored to host Varadkar at his home. He said he is planning a trip to Ireland with his mother, who is first-generation Irish-American (two of Pence's grandparents were born in Ireland).
Mr Varadkar said: "The Irish people have always had a dialogue with the American people". "One way or the other it's going to work out".
He added: "The United States and Ireland are bound together with ties of both kinship and friendship, a really great friendship".