Boris Nadezhdin, the anti-war candidate challenging President Vladimir Putin, has officially submitted his bid for the Russian presidential elections.On Wednesday, Nadezhdin said that he has submitted 105,000 signatures in his support to Russia’s Central Election Commission (CEC).The CEC will check the authenticity and quality of the signatures submitted by Nadezhdin and other would-be candidates and announce next month who will join Putin on the ballot paper.