 On 29 December 2014 Poroshenko vowed to hold a referendum on joining NATO.On 22 September 2015 Poroshenko claimed that "Russia's aggressive actions" proved need for the enlargement of NATO and that the Ukrainian referendum on joining NATO would be held after "every condition for the Ukrainian compliance with NATO membership criteria" was met by "reforming our country".On 2 February 2017, in an interview with Funke Mediengruppe, Poroshenko announced he was planning a referendum on whether Ukraine should join NATO.