European Commission President Jean-Claude Juncker (Image: GETTY)
Mr Hannan claimed the EU chief is “rude, smug and frequently sozzled”. He added that the Luxembourgish politician is “why Britain voted leave” in his Sunday Telegraph column. He accused Mr Juncker of harboring “anti-British” attitudes, as well as “contempt” for democratic processes.
Mr Hannan also claimed Mr Juncker wants to create “the country of Europe”.
Mr Hannan has been a Tory South East England MEP since 1999 and is a long-time Eurosceptic.
He was one of the founders of Vote Leave and has been described as “the man who brought you Brexit”.
He is also known for his stunning put-downs, including his famous speech in Strasbourg where he railed against then-Prime Minister Gordon Brown, calling him the “devalued Prime Minister of a devalued Government”.
READ MORE: Brexit BOMBESHELL: