The new first minister represents a party that does not acknowledge Northern Ireland's six counties as separate from the 26 counties in the Republic of Ireland. The historic moment has huge implications, David Blevins writes.

What should we call a project that poleaxes the economy, destroys our global reputation and threatens political stability in Northern Ireland? If we had known what would come to pass, how would we have voted on it six years ago?

Even the keenest Brexiteer must feel that the process has been tortuously long. / That has been, in large part, because successive British governments have refused to accept the trade-off between untrammelled sovereignty and friction-free access to the EU’s single market, a refusal that shapes today’s increasingly testy relationship.

Sinn Fein's Michelle O'Neill says Brexit is a gamechanger, but the DUP's Arlene Foster doesn't consider Irish unity inevitable.

Republican sentiment is rising over fears that Brexit will tank the economy, but Northern Ireland’s unionists won’t go quietly.

The SNP is on the rise once again in Scotland and nationalist parties in Northern Ireland outnumber unionists for the first time in history.

Fiach Kelly: The main threat from a crashout is political and constitutional, not economic.

As Brexit looms, nationalists in Northern Ireland are increasingly looking to Dublin for representation. Now, as Ben Kelly explains, political parties are responding in new, innovative ways.