New Jersey Governor Chris Christie (L) and his wife Mary Pat (R) listen as Republican US presidential candidate Donald Trump speaks during Trump’s five state primary night event in New York City on Tuesday. Photograph: Reuters

Donald Trump declared himself “the presumptive nominee” to stand as the Republican candidate in November’s presidential election after a clean sweep o(...)

US Republican presidential candidate Donald Trump speaks during a news conference regarding issues on undocumented immigrants in Beverly Hills, California, last year. Trump has vowed to end the H-1B visa programme, which many tech companies rely on to hire highly-skilled workers from abroad. Photograph: Jonathan Alcorn/Reuters

The prospect of a President Donald Trump is rattling Silicon Valley – even if his fellow Republicans can’t find any trace of his campaign there. The (...)

Republican US presidential candidate Donald Trump speaks after receiving the endorsement of former candidate Ben Carson at a campaign event in Palm Beach, Florida. Photograph: Carlo Allegri/Reuters

Republican presidential front-runner Donald Trump won another high-profile endorsement on Friday when retired neurosurgeon Ben Carson became the secon(...)

Trooper Sean Cullen: was stationed in the south New Jersey town of Bellmawr near the Pennsylvania border

A Dublin-born police officer working as a New Jersey State Trooper was killed in Philadelphia while responding to a fire following a crash on one of t(...)

Donald Trump exits the stage after speaking during a Super Tuesday night event in Palm Beach, Florida. Photograph: Luke Sharrett/Bloomberg

The biggest day of the US presidential battle led to the victories for Donald Trump and Hillary Clinton but four state wins for Bernie Sanders, three (...)

Democratic presidential candidate former secretary of state Hillary Clinton greets supporters during a ‘Get Out The Vote’ event at Lake Taylor Senior High School on Sunday in Norfolk, Virginia, ahead of Super Tuesday. Photograph: Getty

Voting has begun in the so-called Super Tuesday primaries in which candidates vying to secure their party’s nomination for the November US presidentia(...)

From left: Senator Marco Rubio, Donald Trump and Senator Ted Cruz during the Republican presidential primary debate in Houston. Photograph: Eric Thayer/The New York Times

The mocking and insulting spilled into another day as Republican presidential frontrunner Donald Trump sought to rebound from a bruising debate on Thu(...)

New Jersey Governor Chris Christie and Republican candidate Donald Trump laugh together during a commercial break in the midst of a Republican debate in New Hampshire. Photograph: Carlo Allegri/Reuters

Republican candidate Donald Trump on Friday won the endorsement on Friday of New Jersey governor Chris Christie, who said the billionaire businessman (...)

The outsiders, anti-establishment twins Donald Trump and Bernie Sanders are back, Iowa forgotten, storming to victories on a scale in New Hampshire th(...)

Senator Bernie Sanders in Concord, New Hampshire, where he defeated Hillary Clinton in the New Hampshire Democratic primary. Photograph: Andrew Harrer/ Bloomberg

The second qualifying round in the US presidential race ended with runaway victories for Democrat Bernie Sanders, the socialist Vermont senator, and R(...)