The results from America's first primary election are in: Right-wing and left-wing candidates set the tone. An unexpected triumph for Ted Cruz. And a narrow victory for Hilary Clinton. But populist rhetoric keeps Bernie Sanders and Donald Trump firmly in the race. Why has the US moved away from the middle ground? And is there a link between populism in the US and populism in Europe? For more go http://www.dw.com/en/top-stories/s-9097