Nepal's law makers will go for fourth round of polling this afternoon to elect a new Prime Minister. The re-polling is being held today as both contesting candidates, the Unified CPN(Maoist) Chairman Prachanda and the Nepali Congress Parliamentary Party leader Ram Chandra Poudel failed to get elected in the third round polls as they could not muster the required two third majority. AIR Kathmandu Correspondent reports that in the 601 member parliament, a winning candidate has to secure 301 votes to obtain a simple majority.