Donald Trump pays tribute to rival Ted Cruz at his victory party in Trump Tower in Manhattan, describing him as “one hell of a competitor”. Photograph: Lucas Jackson/Reuters

Indiana is described as the “crossroads of America”, and Texas senator Ted Cruz came here hoping that he could find a route out of the midwestern stat(...)

Supporting Donald Trump at the California Republican Convention in Burlingame, California on Friday. Photograph: Stephen Lam/Reuters

Deal-maker Donald Trump, the self-declared presumptive Republican presidential nominee, is negotiating his way to the election in November on a simple(...)

Smoke pours from the  World Trade Center in New York after it was struck by two planes during  the September 11th attacks in 2001: 15 of the 19 people involved in the attacks were Saudi citizens. Photograph: David Surowiecki/Getty Images

Twenty-eight pages of the 2002 joint congressional inquiry into 9/11 lie in a guarded vault in the basement of the US Capitol building. Former presi(...)

London mayor  Boris Johnson has come under fire over his attack on the ‘part-Kenyan’  US president Barack Obama. File photograph: Dominic Lipinski/PA Wire

London mayor Boris Johnson has been accused of “dog-whistle” racism after he suggested that Barack Obama’s Kenyan ancestry may have been behind the de(...)

Hillary and Bill Clinton at a campaign stop with Irish American supporters in Manhattan on Monday. Photograph: Mike Segar/Reuters

Pastry chef Bill Yosses fed two US presidents, George W Bush and Barack Obama. He waits for a third, Bill Clinton, and, he hopes, a fourth, Hillary Cl(...)

5th Avenue in New York. The Obama administration – preoccupied with the aftermath of financial crisis and the struggle with bitterly hostile Republicans – has only recently been in a position to grapple with competition policy. Photograph: Chris Goodney/Bloomberg

When Verizon workers went on strike last week, they were mainly protesting efforts to outsource work to low-wage, non-union contractors. But they w(...)

Masked Palestinian Hamas militants watch the televised speech of US President Barack Obama in Rafah, southern Gaza Strip in 2009. AP Photo/Eyad Baba

The horrendous last five years in the Middle East started with joy at the fall of dictators in Tunis and Cairo. Zine al-Abidine Ben Ali’s flight to (...)

The Obama administration has  blocked several big telecoms deals in a bid to protect competition. Photograph: Kevin Lamarque/Reuters

US companies have abandoned $370 billion of large deals since President Barack Obama came into power in 2009, after regulators in his administration b(...)

US president Barack Obama with his Argentinian counterpart Mauricio Macri at the Casa Rosada presidential palace in Buenos Aires on Wednesday. Photograph:  Natacha Pisarenko/AFP/Getty Images

US president Barack Obama met Argentina’s new centre-right leader Mauricio Macri on Wednesday on a visit to reset diplomatic relations and strengthen (...)

 Republican presidential candidate Ted Cruz (L) shakes hands with former  Jeb Bush, who has withdrawn from the race,  before the start of a Republican Presidential Debate. Photograph: Robyn Beck/AFP/Getty Images.

Jeb Bush, the former governor of Florida who left the US presidential race after the South Carolina primary, has endorsed Ted Cruz to contest the pres(...)