Union Home Minister Amit Shah on Wednesday said the battle against drugs was delicately poised and urged states to fight the menace together with the central government, keeping aside politics. Responding to a short-duration discussion in the Lok Sabha on the drug-abuse problem in the country and steps taken by the government to control it, Shah said the Modi government has zero tolerance policy towards drugs and vowed to put behind bars drug traders, howsoever big, in the next two years.