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Simon Harris becomes the country’s youngest prime minister at age 37
PM will also quit as leader of Fine Gael, saying his reasons are both personal and political
Populist party soared in polls but has leached support to small anti-immigration rivals
Sinn Féin hopes good governance will strengthen case for reunification while the DUP believes it will cement UK ties
Mary Lou McDonald focuses on economy more than reunification ahead of general election
Two revealing and compelling portraits of an Irish political force as it finds itself on the brink of power
Cleverly says UK-EU deal must be ‘sustainable’ but he is criticised for not allowing Sinn Féin leader into talks
Thousands have marched through Belfast to demand its official recognition in Northern Ireland
DUP refuses to join power-sharing government in Belfast until UK legislation to override trade deal is enacted
London plays down possibility of a quick referendum on Irish unification after Sinn Féin electoral success
The nationalist party will be the biggest political force for first time in a century
If it wins Thursday’s Northern Ireland elections, the party — inextricably linked to the IRA — will for the first time be the strongest on both sides of the Irish border
Support for the party once associated with the Troubles soars to historic highs
IRA killing of royal in 1979 bombing was ‘heartbreaking’, says McDonald, day after Prince Philip funeral
Preliminary discussions between Fine Gael and Fianna Fáil could result in historic coalition
Intervention comes after party’s shock success in February elections
The Sinn Féin leader’s impact on the doorstep helped propel her party to victory
The group once derided as the mouthpiece of the IRA attracted young voters by concentrating on social issues
Dublin set for drawn-out coalition talks in fractured political landscape
Party broadens appeal beyond IRA-linked past and has captured angst over health and housing
Nationalist breakthrough likely to leave Dublin facing political deadlock
Sinn Féin surge heralds the crumbling of a two-party system that had lost its appeal
Nationalist party could hold balance of power as Leo Varadkar battles for survival
NI secretary Julian Smith says ‘moment of truth’ has arrived to break Stormont deadlock
Secretary of state says Stormont cannot remain empty symbol and threatens fresh elections
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