By Trinna Leong and Al-Zaquan Amer Hamzah KUALA LUMPUR (Reuters) - Protesters gathered on Saturday for a two-day rally in Kuala Lumpur to demand the resignation of Prime Minister Najib Razak, bringing to the streets a political crisis over a multi-million-dollar payment made to an account under his name. Protesters hope to spark a people's power movement forcing Najib out, but political analysts believe he will retain power. Access to a square where the protesters plan to converge was blocked.