This was likely designed as a further rebuff to the Leftist-Globalist Burnham government in London, just like Trump’s promise to help Argentina regain the Falkland Islands a.k.a. Las Malvinas.
from Europe Diplomatic

Brussels 12.09.2026
President Donald Trump said Saturday that Irish reunification “would be a fantastic thing” during a bilateral meeting with Ireland’s Taoiseach Micheál Martin, something he projected is “going to happen eventually.”
When a reporter asked his view on the topic, Trump at first acknowledged his comments could inflame a politically sensitive issue before voicing support.