Hillary Clinton, the Democratic frontrunner in the US presidential campaign, came under fire from Europe’s top trade negotiator on Wednesday for suggesting that, if elected, she might not press hard for a new global trade pact.

“The apparent scepticism about a Doha world trade deal that Mrs Clinton expressed in the Financial Times this week, and her suggestion that there is a need to shelter American companies and interests from foreign investment, are a disappointing sign of the times,” said Peter Mandelson, European Union trade commissioner.