The Green Party have chosen Larry Sanders, the brother of former American Presidential hopeful Bernie Sanders, to run for David Cameron's old seat.
The former Prime Minister quit Parliament earlier this month triggering the Witney by-election, after his defeat at the European Union referendum.
Larry Sanders, 81, grew up in New York and has lived in Oxford since 1969 where he served as a local councillor and spent eight years as leader of the Oxfordshire County Council Green Group. He has credited his brother Bernie with providing most of his political education.
Speaking after his selection, Mr Sanders made a pledge to fight against privatisation of the NHS as a key part of his campaign as well as campaigning for proportional representation.