A businessman watches a display showing global stock markets  in Tokyo. Photograph:  EPA/KIMIMASA MAYAMA

Behind the extraordinary volatility on the stock markets over the past week lies one big fear. It is that the western economies can no longer deliver (...)

US Republican presidential candidate Jeb Bush:  used the term  ‘anchor babies’ in an interview on the campaign trail last week.  Photograph: Brian Snyder/Reuters

The term “anchor babies” has become a lightning rod political issue in the stormy tussle between Donald Trump and Jeb Bush, the two leading candidates(...)

‘I watched the recent Newsnight interview with Yvette Cooper in amazement. How many people was she out to alienate?’ Photograph:  Dan Kitwood/Getty Images

Who is really powerful in the British Labour party? Who wins votes, decides policies, commands budgets, doles out jobs? Who knows how to run something(...)

Republican presidential candidate Donald Trump’s greets the crowd during a rally in Dubuque, Iowa, this week. Photograph: Reuters/Ben Brewer

Donald Trump, the frontrunner in the polls to become the Republican presidential nominee next year, has courted controversy again on the campaign trai(...)

US border patrol agents detaining undocumented immigrants  after they crossed the border from Mexico into Texas. Photograph: John Moore/Getty Images

“Anyone truly interested in US-Mexican border issues needs to stay for more than an afternoon,” says Judith Zafferini, a Democratic state senator for (...)

Republican presidential candidate Donald Trump spars with Univision reporter Jorge Ramos before his “Make America Great Again Rally” at the Grand River Center in Dubuque in Iowa on Tuesday. Photograph: Ben Brewer/Reuters 0:50

Jorge Ramos, an anchor with the Spanish-language Univision network, was removed from Donald Trump’s news conference in Dubuque, Iowa, on Tuesday af(...)

Traders outside the New York Stock Exchange. Global markets plunged again on Monday. Photograph: Lucas Jackson/Reuters

A tumultuous fall in Chinese equities dubbed “Black Monday” by Xinhua, the official state news agency, triggered a ferocious sell-off in international(...)

Donald Trump speaks at a rally  in Mobile, Alabama. Photograph:  Mark Wallheiser/Getty Images

Some blondes have all the fun. As Hillary Clinton and Jeb Bush get more testy, Donald Trump gets more chesty. And more blond. It’s mind-boggling to co(...)

Labour leadership candidate Jeremy Corbyn speaks outside the Tyne Theatre and Opera House, Newcastle, during his campaign. Photograph: Owen Humphreys/PA

Political scientist David Runciman has an interesting analysis of the British Labour Party’s leadership contest, and why Jeremy Corbyn, dismissed by m(...)

Democratic presidential candidate  Hillary Clinton: favourability ratings have fallen to their lowest levels since 2001. Photograph: Isaac Brekken/Getty Images

Hillary Clinton’s lead in the race for the 2016 Democratic presidential nomination has narrowed and her overall favourability ratings have fallen to (...)