Pakistan's Ambassador to the United States Husain Haqqani has said there are challenges faced in Pak-US relations and issues are being addressed via silent diplomacy. "The aspect of national interest could not be neglected in the Pak-US relations," Husain Haqqani reiterated, adding that Pakistan's foreign policy was being prioritised at all occasions by ensuring full implementations of national interests. The ambassador was addressing Pakistani community in Portland city of America. While speaking to the community he said democratic institutions are advancing Pakistan's foreign interests during democratic era.