TikTok says it stores US user data in US but company must still supply information to Chinese government

Startup is exploring a share sale abroad, but remains a long-term objective

Officials continue to highlight Ireland’s concerns about Brexit impact on Belfast agreement

Varadkar’s warning over united Ireland ‘wasn’t in any way provocative’ - former taoiseach

Mohammad Javad Zarif penalised a month after sanctions on supreme leader

Q+A: Is there any special treatment at all for Irish people? What are the barriers to getting a green card?

Move defies European warning to stick to terms of 2015 agreement despite US sanctions

Varadkar says talks with Trump at Shannon Airport included Ireland’s trade surplus with US

Plan to extend scheme to Irish citizens previously failed to get enough support in Senate

Democrat says she will help renewed push in Congress to pass extension of E3 visas to Irish

Pompeo omission of ‘occupied territories’ description from report boosts expectations

Special envoy John Deasy confirms renewed push to secure opening up of E3 scheme

Decline in emigration to US is prompting rethink of long-standing relationship

US Politics: Opposition to Trump’s plan to exit Afghanistan smacks of ‘horror of retreat’

Short-term fix viable only with ‘large down payment’ on border wall, White House says

US Senate fails to back proposal to give some E3 visas to Irish

Doubts raised by number of Senate members over expanding scheme to include Irish citizens

Downing Street says US president was ‘wrong’ to share far-right videos online

‘New York Times’ says Mike Pompeo lined up as new secretary of state, citing senior officials

The longest period of great power peace and relative prosperity in history hangs by a thread. Three men can cut it

For US allies the very real possibility of the deal being reopened is a nightmare scenario

President’s new chief of staff is using his forceful, volatile style to bring order to chaos

Lobbyist says it would take Republicans and Democrats ‘working together’ to bring about immigration reform

Q&A: What changes have been proposed to US immigration system?

Comments come a day after he grudgingly signed into law sanctions against Moscow

Visa application evaluations would be based on merit under proposed new legislation

US secretary of state says Tehran’s ‘provocative actions’ threaten the world

Republican senator urges president to back up allegations or admit he was wrong

President-elect runs rule over aides and contenders for top posts over the weekend

Rebellion required within Obama’s own party to kill off one of their president’s landmark achievements seems unlikely

Romney swerves contest as billionaire brothers commit nearly $900m to election

‘Superior’ candidates led to big victories for Republicans, says campaigner

Obama and Democrats suffer heavy defeats as GOP rule Congress for first time in eight years

The voters are mad as hell, writes Denis Staunton

Couch potato guide: 11 key battlefields