ODM leader Oburu Oginga addresses party delegates at his home in Bondo, Siaya. [Michael Mute, Standard] The demise of former Prime Minister Raila Odinga in October has presented the Orange Democratic Movement (ODM) with its biggest challenge ever: Succession. Raila had become synonymous with ODM in its 20 years of existence, so much so that many could not envisage ODM without him. Raila had a towering, imposing personality and political cunning that commanded respect across the political divide. Filling his shoes is a daunting task. Greek philosopher Aristotle opined that “nature abhors a vacuum”. This maxim was later modified to…