Chairman Pakistan People's Party Bilawal Bhutto Zardari says we believe in the supremacy of the constitution and provision of justice.Addressing the Sindh High Court Bar in Karachi, he said the party has given sacrifices for strengthening democracy.He said that Shaheed Mohtarma Benazir Bhutto always raised her voice for the democracy.Bilawal Bhutto Zardari said that PPP has always raised the voice for the rights of the lawyers in the country.Meanwhile, talking to the media in Karachi, Chairman Pakistan People's Party Bilawal Bhutto Zardari said that the implementation of the charter of democracy is vital for streamlining the political governance system in the country.He said every political leader must follow its party's manifesto.Source: Radio Pakistan