GUWAHATI: Prime Minister Manmohan Singh and his wife, Gursharan Kaur , whose names are on the voters' list of Assam, skipped voting in the assembly election that ended on Monday.The state's chief electoral officer, Hemanta Narzary, said the PM did not fly down to Assam to cast his vote. Returning officer Nareswar Upadhya, who is in charge of postal ballot, told TOI that Singh also did not apply for a postal ballot."Anyone who wants to cast his vote through post has to apply to the Election Commission through form 12A, based on which, we send the postal ballot form to the person. The Prime Minister did not apply for postal ballot and so there was no way he could have cast his vote through the system," the returning officer said.Singh and his wife are voters in the prestigious Dispur constituency and their names are listed under serial numbers 721 and 722; their polling station is Dispur Government Higher Secondary School here.The couple had come down to this polling station in the 2009 Lok Sabha elections to cast their votes.Congress candidate and social welfare minister Akon Bora is fighting a tough battle against Atul Bora, his rival from Asom Gana Parishad (AGP), to retain the Dispur seat. This constituency has historically registered one of the lowest voter turnouts in the state, with the average poll percentage hovering between 59 per cent and 61 per cent.Singh, however, campaigned for the Congress across the state. He visited various constituencies twice, once in each phase.The Prime Minister considers the state as his home. He has been representing Assam in the Rajya Sabha since 1991. He was last elected from the state to the Rajya Sabha in 2007 and his term ends in 2013. Officially, his residence is at Nandan Nagar, Ward No. 51, Sarumataria, in Dispur here. He had rented this house from former Congress chief minister, the late Hiteswar Saikia.