<p>LAHORE, Sept 4: Pakistan Tehrik-i-Insaf Chairman Imran Khan has said the incumbent government lacks vision and policy because it is being dictated by the US. He was talking to the mediapersons after a group of political activists and social workers announced their joining of the party here on Thursday.<br /> <br /> The PTI chief regretted that the rulers had failed to realize the threats the country was facing in the wake of attacks in tribal areas by the Nato forces.<br /> <br /> ???The present government is the weakest in the country???s history which is devoid of any courage to give a matching response to the attackers,??? he said.<br /> <br /> Mr Khan said the masses had started raising slogans of ???Go Zardari go??? even before the PPP co-chairperson became head of the state. He also condemned 31 per cent raise in power tariff and torture of lawyers in Islamabad. ??? Staff Reporter</p>