We don't know whether John Bercow campaigned to leave, or stay in the European Union Source: BBC
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![By Michał Koziczyński (Senat Rzeczypospolitej Polskiej) [CC BY-SA 3.0 pl (http://creativecommons.org/licenses/by-sa/3.0/pl/deed.en)], via Wikimedia Commons](https://upload.wikimedia.org/wikipedia/commons/thumb/c/c5/John_Bercow_Senate_of_Poland_01.JPG/512px-John_Bercow_Senate_of_Poland_01.JPG){kind=link}