WASHINGTON, July 12 (Xinhua) -- The United States public is growing increasingly doubtful about the American troop casualties in Iraq and the Bush administration's credibility, according to an ABC-Washington Post poll published on Saturday.

　　The poll showed that more than half of those surveyed, or 52 percent, said they feel the U.S. troop casualty level in Iraq is unacceptable. It is the first time this poll has found a majority who feel that way.

　　Only 57 percent said the war in Iraq was worth fighting, down from 70 percent at the end of April.

　　Half of the respondents said they believed the administration intentionally exaggerated the evidence that Iraq had weapons of mass destruction.

　　According to the poll, the job approval rating of U.S. President George W. Bush dropped to 59 percent, down from the high 60s to mid 70s where it had been for the last few months.

　　The poll of 1,006 adults was taken Wednesday and Thursday and has an error margin of plus or minus 3 percentage points.

　　The dropping confidence in the Iraq mission and Bush's credibility comes at a time when the Bush administration admitted the accusation that Iraq had tried to buy uranium from Africa was false. End