The question of the Irish border after Brexit is a more pressing matter for the next president than it has been for his predecessor.
Politicians who want to unite Ireland under a Dublin-based government are stuck choosing whether to participate in the UK in an effort to stay in the EU.
The deal put forward might win the prime minister support at home but Brussels also has to get on board.
Despite many Irish-Americans claiming Protestant descent, unionists throughout history have found their rallying cries falling on deaf ears.
What is Boris Johnson's Brexit plan?
Northern Ireland's youngest constituents politely request that politicians stop whining about Brexit.
The House of Representatives speaker repeatedly said the UK can forget about a trade deal with the US if it fails to meet its obligations to the Good Friday Agreement.
The UK's no-deal tariff plan was viewed in Dublin as a way to scare Brexiteers into supporting Theresa May's deal.
How to make sense of the UK government's no-deal Brexit contingency plans to avoid a hard border in Ireland.
What do Theresa May's last minute Brexit guarantees mean for the Irish border?
The history of smuggling across the Irish border.
Why much of the fate of the Irish border lies in the future of the UK's customs arrangements with the EU.
The Northern Ireland Assembly will be consulted on the backstop, but there will no veto.
The prime minister may have won a vote of no confidence in her leadership, but Theresa May will struggle to get what she needs from Brussels.
The EU doesn't want a temporary solution to become permanent.
An EU law expert on what the attorney general's legal advice on Brexit means and its wider significance for the future.
The two countries have successfully collaborated on electricity supply for 11 years, but could Brexit pull this unique UK-Ireland innovation apart?
As the divorce part of the Brexit negotiations approach their endgame, attention is turning to the future relationship between the UK and EU. The view from EU capitals.
While one of the most contentious Brexit issues, politicians forget the essential human aspect of the border as a place that is lived in and loved.
The events of the war caused Irish nationalists to push harder for their independence.