The United States public's opinion on the invasion of Iraq has changed significantly since the years preceding the incursion. For various reasons, mostly related to the unexpected consequences of the invasion, as well as misinformation provided by US authorities, the US public's perspective on its government's choice to initiate an offensive is increasingly negative. Before the invasion in March 2003, polls showed 47–60% of the US public supported an invasion, dependent on U.N. approval. According to the same poll retaken in April 2007, 58% of the participants stated that the initial attack was a mistake. In May 2007, the New York Times and CBS News released similar results of a poll in which 61% of participants believed the U.S. "should have stayed out" of Iraq.
Timeline
March 1992
In March 1992, 55% of Americans said they would support sending American troops back to the Persian Gulf to remove Saddam Hussein from power.
2001
Seven months prior to the September 11 attacks a Gallup poll showed that 52% would favor an invasion of Iraq while 42% would oppose it. Additionally, 64% said that the U.S. should have removed Hussein at the end of the Gulf War.
Post 9/11 sentiment
Following the attacks on the United States on September 11, 2001, United States' popular opinion was seemingly for an invasion of Iraq. According to the CNN/USA Today/Gallup Poll, conducted on October 3–6, 2002, 53% of Americans said they favor invading Iraq with U.S. ground troops in an attempt to remove Saddam Hussein from power (Saad, Lydia). The American public's support for the war fluctuated between 50% and 60% during the aftermath of the attacks on 9/11.
When asked whether or not the United States should attack a country that has not attacked the United States first, the American public's opinion was in support with 51%, whereas when Iraq was embedded into the question the attitude shifted and there was a shift to 66% of Americans agreeing that the U.S. should be able to invade Iraq first.
Despite public concern for the consequences of war the public's support remained very high. Original concerns included, 55 percent of Americans fearing that the war would last too long, 44 percent taking into consideration a mass number of casualties, 62 percent of the public being convinced that this would increase short-term terrorism domestically, 76 felt there would be a higher risk of domestic bioterrorism, and 35 believed that the draft would need to be reinstated. At the same time 40 percent of the American public was against having protests because they believed it would undermine the success abroad. Additionally, 55 percent supported the war even without support from the UN.
Approximately two-thirds of respondents wanted the government to wait for the UN inspections to end, and only 31% supported using military force immediately. This same poll showed that a majority believed that Iraq had weapons of mass destruction, but did not expect UN inspectors to find them. These numbers indicated a dramatic drop in support, as, two months prior, most polls showed about two-thirds of those polled supporting military action. However, about 60% of those polled also supported, if necessary, the use of military action to remove Hussein from power which closely mirrored recent polls taken by Time Magazine, CNN, Fox News, USA Today, CBS News, and other news organizations. Polls also showed that most Americans did not think that Saddam was co-operating with inspectors.
Polls also suggested that most Americans would still like to see more evidence against Iraq, and for UN weapons inspections to continue before making an invasion. For example, an ABC news poll reported that only 10% of Americans favored giving the inspectors less than a few weeks; 41% favored giving them a few weeks, 33% a few months, and 13% more than that.
A consistent pattern in the months leading up to the U.S.-led invasion was that higher percentages of the population supported the impending war in polls that offered only two options (for or against) than in polls that broke down support into three or more options given (distinguishing unconditional support for the war, opposition to the war even if weapons inspectors do their job, and support if and only if inspection crews are allowed time to investigate first).
