KARACHI: Mayor Karachi Wasim Akhtar departed for United States on a personal trip along with family last night.According to the details, Mayor Karachi is on a week-long visit to the States and in his absence, Deputy Mayor Arshad Hassan will look after the city affairs as an acting Mayor Karachi. Wasim Akhtar also went on a personal trip to United States in July last year. This time he is travelling with his family members.There are rumors that Wasim Akhtar has some differences with MQM Pakistan leadership. He didn’t give his appearance in MQM – PTI dialogue session related to the issues of Karachi. Earlier this month, Muttahida Qaumi Movement (PAKISTAN) leader has announced to leave Federal Cabinet.According to sources MQM-P has saved Mayor Karachi as NAB is investigating some KMC departments and concerned officers have also recorded their comments.