"If #PPO (Protect Pakistan Ordinance) passes in its current form one day PM NS will be arrested using it. I hope the senate does the right thing and does not let it pass," Bilawal, the son of the slain prime minister Benazir Bhutto, tweeted.
"Tahafuzz-e-Pakistan" or PPO was passed by the National Assembly last Monday.
All the opposition parties staged a walkout from the National Assembly when the bill was presented and the Human Rights Commission of Pakistan and Imran Khan's Pakistan Tehreek-e-Insaaf have said they will challenge it in the court.
Opposition parties have vowed to stop the legislation from being passed into law without significant amendments.
