New Democracy’s parliamentary spokesman Kyriakos Mitsotakis has accused Finance Minister Yanis Varoufakis of being a danger to Greece.

The Finance Ministry was forced on Sunday to deny a report in Corierre della Serra newspaper that Varoufakis had claimed the government would call a referendum on euro membership if its eurozone partners reject its reform proposals.

“Every time he opens his mouth, he creates a problem for the country’s negotiating position,” said Mitsotakis. “He has managed something unique: To unite the whole of Europe behind Wolfgang Schaeuble.”

Mitsotakis said Prime Minister Alexis Tsipras should replace Varoufakis as soon as possible.