Did it? Only 789,879 ballot papers where valid when the counting took place. Wasn't a significant margin compared to say Scotland. Although I do understand the arguement that Ireland is an Island and the Northern part is part of the UK. It is up to any new Northern Ireland devolved power sharing assembly if they are to hold a border poll and to request such a poll from Parliament (Westminster), not the Republic and people are annoyed that the impasse in Northern Ireland's Stormont that there has been no devolved assembly since January 2017 as it has had a financial knock on effect throughout Northern Ireland on its public services etc (hopefully this will be resolved soon).