nairobi police fire tear gas friday opposition protesters kenya capital demand officials involve august cancel presidential election sack crowd gather nairobi port mombasa kisumu western stronghold opposition second time week last month kenya supreme court void aug. presidential election cite irregularities criticize specific individual election board president uhuru kenyatta officially 1.4 million vote victory annul accuse supreme court bring country close judicial chaos opposition leader raila odinga supporters turn ire election board role cancel poll three weeks go schedule new election politicians side trade insult accusations raise fear turmoil kenya transport economic hub east africa opposition threaten boycott oct. 26 re-run election board officials remove parliament pass propose amendment election law amendment could prevent supreme court annul result procedural ground parliamentarians return recess next week may pass bill action likely spark protest opposition reaction expect vote next week unite state major donor kenyan government security force say sharply word statement friday change electoral laws without broad agreement prior poll consistent international best practice increase political tension say side undermine electoral board recent weeks stoke tensions early friday nairobi county police commander say people would allow protest anyone try destroy property would deal firmly police tear-gas kenyan vote protesters crowd gather cities