The DUP is threatening to launch legal action against the British Government over the legality of the Northern Ireland Protocol.
Arlene Foster, Jeffrey Donaldson and Sammy Wilson say the Brexit settlement for the North goes against the Act of Union.
Later today the House of Commons will debate the party's petition, demanding Britain lift customs and agriculture checks on goods crossing the Irish Sea.
However Fianna Fáil's Brexit spokesperson Lisa Chambers says Unionists should give the system more time to work out any early kinks.
Shaping the Future of Newtownmountkennedy: A Town Team’s Vision for Growth and Community
North Wicklow GP Advice As Flu Season Hits Hard Locally
Wicklow Struggles With Rising Youth Anti-Social Behaviour Amid A Lack Of Collaboration And Resources
Planning A Seasonal Dip? Follow These Water Safety Tips
TD Says No 'Realistic' Rail Plan Evident Amid Failure To Address Growing Commuter Crises For Wicklow