evidence: The party topped the first-preference vote with 29%, which will position its deputy leader, Michelle O’Neill, to become the region’s first minister, the first nationalist to hold the position in a historic turnaround and a severe blow to unionism. With transfer votes still being counted on Friday night, it was clear the Democratic Unionist party (DUP) had dramatically lost its pre-eminence by slumping to 21.3% in the first preference vote. "A disaster for the DUP," tweeted Tim Cairns, a former special adviser to the party. [...] Unionists sought comfort in the fact that overall support for unionist parties marginally outweighed support for nationalist parties. Opinion polls show solid support for Northern Ireland remaining in the UK, but Sinn Féin hope to build momentum towards a referendum on Irish unity, a goal boosted by the party’s surging popularity in the Republic of Ireland, where, under McDonald, it leads the opposition in the Dublin parliament.