WASHINGTON (APP) - Pakistans Ambassador to the US Hussain Haqqani Sunday said Pak-US relations face some serious challenges but both the countries are working to overcome these challenges. Addressing a gathering of Pak-Aemricans in Portland, he said Pakistans foreign policy objectives were based on the countrys national interests and within the present democratic era an active and healthy debate on national interest was taking place. Haqqani spoke against the backdrop of recent tensions in the relationship, starting with Admiral Mike Mullens assertions days before his retirement last month, when he alleged that the Afghan Haqqani militants had Pakistani support in carrying out attacks in Afghanistan. Praising the achievements of Pakistan-American community, he called upon them to play a more constructive role in helping the government for democratic dispensation. He spoke about Islamabads efforts towards socio-economic development of the people. He said despite resource constraints, the government is striving to grapple with devastation caused by massive floods in Sindh and parts of Balochistan. He applauded the Pakistani diaspora and urged them to assist the country with their generous contributions in dealing with the flood catastrophe that has displaced millions and destroyed infrastructure and vital crops over huge swathes of agricultural land. Haqqani also drew attention of the hardworking Pakistani-American community to the importance of their participation in mainstream American politics through association with local political and public causes. He particularly highlighted the need for Pakistani-Americans to be articulate and for the younger generation to avail tremendous opportunities in think-tanks, research institutions, print and electronic media. A vibrant Pakistani-American community would serve interests of both countries, he noted. He assured the Pakistani community of better consular services by the Pakistani embassy.