strongAhmedabad/strong: UPA presidential candidate Pranab Mukherjee today said it would be his endeavor to protect the values of the office of President- integrity and impartiality. The President stands above party politics. Given an opportunity, it shall be my endeavor to protect the values of this office: integrity, impartiality and the promotion of 'sarva dharma sambhav' which constitutes the spirit and essence of our Constitution, Mukherjee said in a letter to Congress MLAs and MPs here. [caption id=attachment_369160 align=alignleft width=380