Prince Bandar is seen as a foreign policy hawk, especially on Iran. The Sunni Muslim kingdom's rivalry with Shi'ite Iran, an ally of Syria, has amplified sectarian tensions across the Middle East.A son of the late defense minister and crown prince, Prince Sultan, and a protégé of the late King Fahd, he fell from favor with King Abdullah after clashing on foreign policy in 2005.But he was called in from the cold last year with a mandate to bring down Assad, diplomats in the Gulf say. Over the past year, he has led Saudi efforts to bring arms and other aid to Syrian rebels."Prince Bandar told diplomats that he plans to limit interaction with the U.S.," the source close to Saudi policy said."This happens after the U.S. failed to take any effective action on Syria and Palestine. Relations with the U.S. have been deteriorating for a while, as Saudi feels that the U.S. is growing closer with Iran and the U.S. also failed to support Saudi during the Bahrain uprising," the source said.The source declined to provide more details of Bandar's talks with the diplomats, which took place in the past few days.