The problem mentioned most often by all the adults polled was the war â€” in Iraq and conflicts in general â€” 22 percent; economy at 14 percent; immigration and political leaders at 9 percent; the energy crisis at 8 percent and terrorism at 7 percent.
Other problems mentioned were: morality, 4 percent; education, 3 percent; crime and drugs, 1 percent and the environment, 1 percent.
The remainder cited foreign affairs issues 3 percent; other domestic issues, 3 percent or were undecided.
Half of Americans now say Iraq had weapons of mass destruction when the United States invaded the country in 2003 -- up from 36 percent last year, a Harris poll finds. Pollsters deemed the increase both "substantial" and "surprising" in light of persistent press reports to the contrary in recent years.
The survey did not speculate on what caused the shift in opinion, which supports President Bush's original rationale for going to war. Respondents were questioned in early July after the release of a Defense Department intelligence report that revealed coalition forces recovered 500 aging chemical weapons containing mustard or sarin gas nerve agents in Iraq.