Kenyan politics is marred by tribalism, violence and graft and this year's election will be the true test of how far the country has come since single-party rule, its election commission said on Wednesday. Polls in 2002 that removed long-time ruler Daniel arap Moi were seen as broadly free and fair. But Samuel Kivuitu, the chair of the Electoral Commission of Kenya (ECK), said there were major challenges before the nation votes again in elections expected in December.