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Nawaz Sharif had been facing the cases and also cooperated with Joint Investigation Team (JIT) on Panama Papers issue, he said talking to a private news channel.
The minister said Pakistan Tehreek-i-Insaf (PTI) chief Imran Khan was using derogatory language against leadership of Pakistan Muslim League-Nawaz (PML-N) which did not suit him as leader of political party.
He said political matters should be handled in a political way.
Replying to a question, he said Raza Rabbani had established himself as veteran politician, statesman and parliamentarian, who always worked for strengthening the democracy.