President George W Bush reassured Turkey's prime minister Friday that he opposes efforts by US lawmakers to denounce the Ottoman Empire's killings of Armenians as genocide, the White House said Friday. Bush's phone talk with Prime Minister Recep Tayyip Erdogan came as a US House of Representatives panel prepared to vote on a resolution on the deaths of as many as 1.5 million Armenians from 1915 to 1923, DPA reported. Turkey vehemently rejects the genocide label and fights efforts by other countries to apply it. The Bush administration fears that the resolution would anger a key ally in NATO whose support is critical for stabilizing neighbouring Iraq.