Mary C Murphy: What Sinn Féin's election success means for Irish relations with the EU – and Brexit

Ireland’s traditionally centre-right conservative political system has been rocked by a wave of support for Sinn Féin in the February 8 general election, writes Mary C. Murphy,
The previously small left-wing republican party with historic links to the paramilitary Provisional Irish Republican Army, now has legitimate ambitions to form part of the next Irish government in coalition with other parties.