US  presidential candidate Donald Trump at Manhattan Supreme Court in New York on Monday, where he appeared for jurty duty. Trump’s  hard line on immigration has driven rivals to match his biting anti-immigrant language. Photograph: Lucas Jackson/Reuters

Republicans thought they had learned a lesson after 2012: Turning off Latino voters ensures defeat in the general election. But as the disruptive US p(...)

Republican presidential candidates from left, Chris Christie, Marco Rubio, Ben Carson, Scott Walker, Donald Trump, Jeb Bush, Mike Huckabee, Ted Cruz, Rand Paul, and John Kasich take the stage for the first Republican presidential debate at the Quicken Loans Arena, Thursday, August 6th, 2015, in Cleveland. Photograph: AP Photo/Andrew Harnik 0:36

“Authenticity”. That’s the magic ingredient, the sprinkling of gold dust, that every pol’ needs in this age of disillusionment with politics and polit(...)

Donald Trump and Jeb Bush participate in a debate of ten leading Republican presidential hopefuls at the Quicken Loans Arena in Cleveland. Photograph: Doug Mills/The New York Times

The first question to Chris Christie was about the nine credit downgrades that New Jersey had suffered since he became its governor. Ben Carson was(...)

Wisconsin Governor Scott Walker  listens as Donald Trump speaks during the Republican presidential debate. Photograph: AFP/Getty Images 0:36

Donald Trump dominated the first Republican presidential debate, where the property mogul was the literal and figurative centre of the action. Trump d(...)

Ahead of the first US Republican TV debate on Fox, Donald Trump sits atop the polling average - and has in fact widened his lead - with Jeb Bush and Scott Walker behind him. Photograph:  Frederic  J. Brown/AFP/Getty Images.

For the last several weeks, the likely slate of US Republican candidates for the first televised debate this week has shifted constantly at the cut(...)

Ahead of the field: Donald Trump in Texas on Thursday. He said he’s confident of winning the Hispanic vote. Photograph: Matthew Busch/Getty

On Tuesday the Republican senator Lindsey Graham, one of 16 candidates seeking his party’s presidential nomination in the 2016 US elections, appear(...)

 Donald Trump  as he announces his candidacy for the US presidency:  his comments about Mexicans   have made him stand out in a crowded field of Republican candidates. Photograph:  Christopher Gregory/Getty Images

It’s hard to say what’s more shocking: the outrageous remarks property magnate Donald Trump has made since he announced his presidential candidacy or (...)

Hillary Clinton at Texas Southern University, Houston, where she delivered her most aggressive speech since she announced she was running for president.  Photograph: Pat Sullivan/AP Photo

Republican senator Ted Cruz was firing up conservatives gathered to support his colleague Pat Roberts, who was struggling to hold on to his US Senate (...)

Former Texas governor Rick Perry at the announcement in Dallas yesterday of his candidacy for US president in 2016. Photograph:  Ron Jenkins/Getty Images

With 521 days to go until the US presidential election, the field is already packed with candidates. Far more Republicans have declared; among (...)

The fight over the sweeping domestic spying powers, revealed in media leaks by former NSA contractor Edward Snowden, has moved to the Senate where majority leader Mitch McConnell and other Republicans want the Patriot Act bulk collection extended until 2020. Photograph: Zach Gibson/The New York Times

The US Senate is facing intense pressure to enact a law maintaining the power to track telephone calls as part of counterterrorism efforts before the(...)