US presidential candidate Donald Trump waves from his car  in Laredo, Texas, on July 23rd, where he had difficulty summoning details when pressed on how he would fix the immigration system. Photoghraph: Tamir Kalifa/The New York Times

The most pressing question that Donald J Trump could face next week in the first debate of the US 2016 presidential race may not be about Iran or immi(...)

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 has infuriated Republicans by criticizing fellow members of the party and made many of them uncomfortable with harsh remarks about illegal immigration and other issues. Photograph: Joshua Lott/The New York Times

US presidential hopeful Donald Trump persisted in his attacks on fellow Republicans on Tuesday, calling US Senator Lindsey Graham an “idiot” and givin(...)

Donald Trump: asked whether John McCain was owed an apology, Mr Trump told ABC talk show This Week: “No, not at all.” Photograph:  Joshua Lott/New York Times

Republican presidential candidate Donald Trump has stirred controversy again after questioning the war record of Republican senator John McCain, a fo(...)

 President Barack Obama: stressed that there was no alternative to the deal. Photograph: Getty Images

The tough negotiations leading to a nuclear deal with Iran may have concluded in Vienna, but the hard work on selling the agreement to sceptical Repub(...)

President Barack Obama, with Vice President Joe Biden, at a press conference in response to the Iran nuclear deal. Photograph; Andrew Harnik/Getty Images

US president Barack Obama faces stormy weeks ahead as he must convince fellow Democrats and Republicans at home and disgruntled allies in the Middle E(...)

The state flag of Mississippi, which incorporates the   Confederate flag , is displayed with the flags of the other 49 states and territories in the tunnel connecting the senate office building and the US Congress. Photograph: Chip Somodevilla/Getty

The Confederate flag has meant different things to different people over the years in the United States. It is far more than just a diagonal blue cros(...)

Lindsey Graham, a three-term senator from South Carolina, cited the increasing violence in the Middle East as motivation for his decision to run. Photograph: Win McNamee/Getty Images

Senator Lindsey Graham, a foreign policy hawk, has become the latest Republican to join the party’s fast-growing field of presidential candidates. Mr (...)

Hillary Clinton:  responded positively but cautiously to the framework deal.  Describing the tentative agreement as “an important step” in preventing a nuclear-armed Iran, she said: “The devil is always in the details in this kind of negotiation. The onus is on Iran and the bar must be set high.” Photograph: Nicholas Kamm/AFP/Getty

Likely Republican challengers for the US presidency in 2016 voiced strong opposition to the outline of a nuclear deal with Iran, rejecting any deal (...)

US senator Ted Cruz  with his wife Heidi Nelson Cruz and children at Liberty University in Lynchburg, Virginia, on Monday, after announcing his intention to run for president. Cruz’s wacko status is precisely  his appeal.  Photograph: Jay Paul/Bloomberg

Liberals, political reporters and people who revel in the general recurrent ridiculousness of American politics could not hide their delight in the ir(...)