KUALA LUMPUR (Reuters) - Malaysian police fired tear gas and water cannon in clashes with thousands of protesters demanding electoral reforms on Saturday, raising the risk of a political backlash that could delay national polls which had been expected within months. Riot police reacted after some protesters among the crowd of at least 25,000 tried to break through barriers, in defiance of a court order banning them from entering the city's historic Merdeka Square. They fired several dozen tear gas rounds, sending the protesters scattering through nearby streets. ...