The delegation is expected to visit Northern Ireland later this week.
Delivering a speech in the Dáil chamber in Dublin yesterday she warned that Brexit can not be allowed to undermine the Good Friday Agreement.
Pelosi's comments are likely to annoy members of the ruling Conservative party who insist that a hard Brexit - which include the United Kingdom leaving the bloc's single market and customs union - is necessary in order for the country to strike trade agreements with third countries.
'We treasure the Good Friday accord because of what it says is possible for the entire world and the reason to hope that in every place the dreams of reconciliation is possible for them too.
Speaking in Dublin yesterday, Ms Pelosi said two decades of peace can not be jeopardised by the Brexit process.
"We have said that we are guarantors of the Good Friday Agreement because we believe it is fair to both sides, that is why they agreed to it". She also warned that the "seamless border" in Northern Ireland must remain.
"If the Brexit deal undermines the accord there will be no chance of a US-UK trade agreement".
"We must not and we will not allow that progress to be undermined", Pelosi warned on Wednesday, calling the agreement a "beacon to the world".
Watch the Next Antares Rocket Launch the NG-11 Mission
Koch is now a part of the Expedition 59 and 60 crew that launched to the International Space Station in March 2019. Koch will break the record of 288 days for the longest single spaceflight by a woman at the end of December.
Hurricane Michael upgraded to Category 5 storm, here's why
PANAMA CITY, FL - OCTOBER 20: A vehicle drives past trees broken by Hurricane Michael on October 20, 2018 in Panama City, Florida. This makes Hurricane Michael the first category 5 to hit the United States since 1992's Hurricane Andrew .
Trump rips into ex-advisers who spoke with Mueller
Most importantly, the vote was not affected", Trump wrote on his official Twitter account". Senate, Chuck Schumer, and House Speaker Nancy Pelosi say the conclusions drawn by U.S.
US House of Representatives speaker Nancy Pelosi has visited the Irish border as part of a visit to Northern Ireland and the Republic of Ireland.
Dermot O'Hara, a spokesman for Border Communities Against Brexit, greeted her at the frontier.
"We want it to be as close as it can possibly be".
The Withdrawal Agreement has been rejected three times by British lawmakers.
He said: "They will support us in ensuring it does not impact on that very important agreement which was signed in 1998".
'We did our best to point out that no one was contemplating any such arrangement on the border including Leo Varadkar who has said himself that no such infrastructure would be necessary'.
"Many of us going back generations remember what a hard security border looked like here".
Ms Pelosi is the third most powerful politician in the US. "We can not jeopardise that".