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Donald Tusk

Battling sides drag Hitler, IS into Britain's EU debate

Britain's referendum campaign grew increasingly edgy Tuesday after Prime Minister David Cameron suggested that a British EU exit would make the Islamic State group happy and the EU president lashed out at London's ex-Mayor Boris Johnson for comparing the bloc's aims to those of Adolf Hitler.

The arguments sparked allegations of rhetorical excess from both sides and prompted European Council President Donald Tusk to finally enter the referendum debate, deriding Johnson's comments.

Tusk said that "when I hear the EU being compared to the plans and projects of Adolf Hitler I cannot remain silent."

"Such absurd arguments should be completely ignored if they...