Jayne McCormack and Jessica Lawrence
BBC News NI
PA Media
Sinn Féin president Mary Lou McDonald and first minister Michelle O'Neill will not attend St Patrick's Day events at the White House this year
When power-sharing is functioning, it is custom for the first and deputy first ministers to make the trip to Washington DC.
In a video posted on the social media platform X, McDonald said she had followed the president's comments on Gaza with "growing concern" and had listened in "horror" to calls for "mass expulsion of the Palestinian people from their homes and the permanent seizure of Palestinian lands".
"Such an approach is a fundamental breach of international law, is deeply destabilising in the Middle East and a dangerous departure from the UN position of peace and security for both Palestinians and Israelis and the right of Palestinians to self-determination," she added.
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Mary Lou McDonald says Irish people have listened "in horror" to comments made by Donald Trump
At a press conference following the announcement, McDonald added that the US is a "valued friend" of Ireland, with strong peace ties and role in the Irish economy.
However, the Sinn Féin president said the current US administration is "catastrophically wrong" on Palestine.
"I have made a decision not to attend events in the White House this year as a principled stance against the call for the mass expulsion of the Palestinian people from Gaza," she said.
"The only route to peace and security is a permanent ceasefire followed by a negotiation settlement which guarantees peace and security for both Palestinians and Israelis through a just and sustainable two state solution and that should be the solution of the US."
McDonald also called on Taoiseach (Irish prime minister) Micheál Martin to use the celebrations as an opportunity to reflect the views of the Irish people in relation to Palestine in support of International law.
What did Trump say about Gaza?
Getty Images
Trump made his comments on Gaza earlier this month
O'Neill said she had spoken to Deputy First Minister Emma Little-Pengelly on Friday morning to inform her of the decision.
"It is absolutely her call in terms of what she may decide to do," she added.
"For me this about taking a principled stand this is about a moment in time a moment in history when we will all reflect on what we did and this is an opportunity to take a stand for the Palestinian people."
Why do politicians travel to Washington?
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Last year, then-Taoiseach Leo Varadkar presented former US President Joe Biden with a bowl of shamrocks at the White House
Last week, SDLP leader Claire Hanna said her party would decline an invite to the White House over the president's stance on Gaza.
She told BBC Radio Ulster's Talkback programme that she could not "in good conscience" attend as people have made their hopes and fears for the Palestinian people clear.
It is the second year in a row the party have said it would turn down an invitation to St Patrick's Day celebrations.
Democratic Unionist Party (DUP) assembly member David Brooks described the SDLP's decision as a "petulant stunt".