Reiterating his claim of winning last month’s disputed national election, opposition leader Sam Rainsy told thousands of supporters in Phnom Penh on Tuesday to prepare for a mass demonstration against the ruling CPP unless its leaders stepped down. Addressing an excited crowd of more than 5,000 fans at Freedom Park, Mr. Rainsy made little mention of the investigation he had been calling for into reports of widespread voting irregularities and said the time had come for the CPP to simply accept defeat.