Polanski under pressure after Zionism row & by-election loss

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Zack Polanski has defended his leadership of the Green party, after senior party figures criticised his response to a motion passed by members declaring Zionism as a form of racism. Speaking after coming second to Labour in the Holborn and St Pancras by-election, Polanski said he would stay on as Green leader. Today's Nick Robinson hears more from BBC Political Editor Chris Mason. Image Credit: Jordan Pettitt/PA Wire