New Delhi, July 18 -- With a solid majority in the assembly under a popular leader, the Congress in Punjab isn't facing the kind of challenges its governments are in Madhya Pradesh, Rajasthan and Karnataka. Yet Captain Amarinder Singh faces an unlikely political detractor, who is neither from the Shiromani Akali Dal (SAD) nor the Bharatiya Janata Party (BJP) but a lateral entrant to the Congress from the BJP....