In the 2014 Ukrainian parliamentary election Tomenko was re-elected into parliament after being in the top 10 of the electoral list of Petro Poroshenko Bloc. On 25 December 2015 Tomenko left the party's parliamentary faction. On 25 March 2016 the party Congress of Petro Poroshenko Bloc withdraw his parliamentary mandate using the Imperative mandate provisions of the Ukrainian constitution. This was considered illegal by Tomenko; on 28 July 2016 Ukraine's highest Administrative Court rejected his appeal to gain back his parliamentary seat.