The British move to change unilaterally part of its withdrawal deal with the EU could trigger a trade war with the bloc.
Post-Brexit trade friction makes some citizens in the province feel like foreigners in their own country.
Northern Ireland border comes back as a stumbling block for British-EU relations.
European Commission President Jean-Claude Juncker tweeted: "We have one! It’s a fair and balanced agreement for the EU and the UK and it is testament to our commitment to find solutions."
Could technology help prevent bottlenecks on the EU-U.K. border?
The border between the Republic of Ireland and the U.K. province of Northern Ireland is a big Brexit sticking point.
The Irish Republic wants a guarantee that the border will remain open after Britain leaves the European Union. ...will stay as open as it is today.