US Speaker of the House Nancy Pelosi arrives in Ireland today.

She's leading a Congressional delegation on a visit to Europe. The group has so far been to Stuttgart and London and is also due to visit Northern Ireland.

Brexit and the border are expected to feature strongly while Nancy Pelosi is in Ireland.

Ahead of the trip, Speaker Pelosi said she and her Congressional colleagues would "meet with senior government officials and local leaders to learn more about the future of the UK and Ireland amid Brexit and to express America’s commitment to a peaceful and prosperous future for all who live there."

"The United Kingdom and Ireland each have a deep and special bond with the United States," said Speaker Pelosi. 

"Our distinguished delegation is traveling at a critical moment for two of our closest allies, and we look forward to high-level discussions about the path forward on our shared security and economic interests," she added. 

Yesterday in London, Speaker Pelosi made reference to the Northern Ireland peace process.

Delivering an address at the London School of Economics, she said there would be no chance of a US-UK trade deal if there was any threat to the Good Friday Agreement.

"First of all it is very hard to pass a trade bill in the Congress of the United States, so it's no given anyway. But if there were any weakening of the Good Friday accords there would be no chance whatsoever, a non-starter for a US-UK trade agreement," she said.

Among those travelling with Nancy Pelosi on this Congressional delegation are the chairman and several members of the House Ways and Means Committee. This is the committee that will oversee any future trade deal between the US and the UK in a post-Brexit scenario.

The Committee's chairman, Irish-American Congressman Richard Neal, has warned in the past that the return of a hard border on the island of Ireland would threaten a future trade deal. 

Those sentiments have been echoed by another Irish-American Congressman, Brendan Boyle. Both representatives Neal and Boyle are accompanying Speaker Pelosi on her visit to Ireland.

Tomorrow, Nancy Pelosi is due to meet President Michael D Higgins and will also address the Dáil to mark its 100th anniversary.

We can probably expect lots of references to US-Irish relations during the speech.

She has said that she will use the opportunity to celebrate the enduring friendship between America and Ireland. 

"I look forward to returning the warm message of friendship that Taoiseach Varadkar brought on behalf of the Irish people when I had the privilege of hosting him at the United States Capitol last month," Speaker Pelosi said.

On that occasion, Nancy Pelosi made reference to her own family's links to Ireland. 

"Well I don’t have Irish grandparents, I do have Irish grandchildren; Liam, Sean and Ryan. They’ve been baptised in the Kilquade church, in Co Wicklow and they always remind me of the exuberant spirit of the Irish people," she said.

The Irish Government will no doubt use this week's visit to make the case for its renewed push to get access to the E-3 visa programme.

Every year, more than 10,500 E-3 visas are offered to Australians who want to work in the US, but only around half of them are taken up.

Ireland wants to be able to access the remaining unused visas.

In November, the House of Representatives voted in favour of an E-3 visa deal but it failed to get the unanimous support that was required in the US Senate.

Irish officials are hoping that a new E-3 bill will be introduced in Congress in the coming weeks.