Several hundred Donald Trump supporters — a few of them openly carrying guns as allowed under Ohio law — gathered for the first major pro-Trump rally of the four-day Republican National Convention.

Having cemented a remarkable triumph as his party’s presumptive nominee Donald Trump, the billionaire businessman, vowed to unite the splintered Republican party, even as he was bitingly dismissive of members who have been critical of his campaign.

Donald Trump has hit out at a collaboration between Ted Cruz and John Kasich aimed at unifying the anti-Trump vote in some remaining primaries.

Donald Trump's Republican rivals have announced shock plans to co-ordinate primary strategies in upcoming states to deprive the front-runner of the delegates he needs to win the party nomination.

Good morning. Here’s everything you need to know before you start your day.

As the ‘nuclear option’ of a contested convention looms large for the Republicans, the Democrats face their own woes after a bruising candidate battle left the party wounded, writes Bette Browne

The city’s delegate tally is decisive in the race for the US presidency, and Donald Trump and Hillary Clinton could win their parties’ nominations there next Tuesday, says Bette Browne.

Republican presidential front-runner Donald Trump is strengthening his top team and refocusing on New York after recent tactical failures raised doubts about his campaign.

Ford has announced it plans to invest $1.6bn (€1.4bn) to build more small cars in Mexico, starting in 2018, triggering a fresh blast of criticism from Republican frontrunner Donald Trump.

Republican presidential front-runner Donald Trump is calling on rival John Kasich to get out of the White House race, arguing that the Ohio governor should not be allowed to collect future delegates because the nomination is already beyond his grasp.

A frustrated Donald Trump stepped up his presidential campaign after a rough week and found himself on the defensive just two days before the closely watched primary in Wisconsin.

The senator is a cause rather than just a candidate and thus has a real chance to beat Clinton, writes Robert L Borosage

US Democratic presidential contender Bernie Sanders easily won nominating contests in Alaska, Hawaii, and Washington, chipping away at front-runner Hillary Clinton’s commanding lead in the race to pick the party’s candidate for the White House.

What the world would look like under President Donald Trump? By Matthew Cooper

If a third party candidate, such as Mitt Romney, runs in the upcoming United States presidential election and neither Trump or Clinton get a majority (270) of electoral college votes the Speaker of the House Paul Ryan will decide who will be the next President.

Protesters blocked a main road leading to the Phoenix suburb where Republican presidential front-runner Donald Trump staged a campaign rally days ahead of the Arizona primary.

Front-runner Donald Trump tried to prove no perceived misstep can derail his march to the Republican presidential nomination.

Republican front-runner Donald Trump has vowed to continue his abrasive presidential campaign rhetoric, rejecting any responsibility for violence at his rallies and defending supporters accused of attacking protesters.

Republican presidential candidates Marco Rubio and John Kasich have suggested they may not support Donald Trump if he becomes the Republican nominee, as violence at the front-runner's rallies deepened the party's chaotic chasm.

Donald Trump has called for Republicans to rally behind his presidential candidacy after he cruised to primary victories in three more states.

Socialist Bernie Sanders has breathed new life into his long-shot White House bid with a crucial win in Michigan's presidential primary, chipping away at Hillary Clinton's dominance in the Democratic race.

Ted Cruz and Donald Trump each captured two victories in yesterday's four-state round of voting in the Republican race for the White House.

Brawling from the beginning, a fiery Marco Rubio went after front-runner Donald Trump in the last Republican presidential debate before the key ‘Super Tuesday’ contest, lashing out at his position on immigration, his privileged background, and his speaking style.

Former US president George Bush will be campaigning for his younger brother Jeb in South Carolina, marking his most direct entry into the 2016 White House race to date.

New Hampshire the next stop for candidates seeking delegates’ votes

Terror in Paris and California is stoking the increasingly apocalyptic rhetoric of prospective US presidential candidates ahead of both parties’ debates this week, writes Bette Browne

One cooks bacon with a machine gun — that’s Ted Cruz. 

It’s the stuff of Republican nightmares: Fox News runs out of advertising time.