CHANDIGARH, April 15 -- The Congress party unveiled its six candidates for the Lok Sabha polls in Punjab on Sunday, strategically positioning its heavyweights, including former chief minister Charanjit Singh Channi from Jalandhar along with two sitting MPs Gurjeet Singh Aujla from Amritsar and Amar Singh from Fatehgarh Sahib. However, the candidature of Bholath MLA Sukhpal Singh Khaira, a known bete-noire of Bhagwant Mann, from Sangrur, the home turf hold of the Punjab chief minister, makes it the most interesting battle of Lok Sabha in Punjab....