Washington (CNN) - As President Barack Obama weighs launching a military strike against Syria for its alleged use of chemical weapons, American public opinion over whether the U.S. should get involved appears conflicted.
The most recent national polling over the past few months suggests that most Americans, weary after more than a decade of wars in Afghanistan and Iraq, don't favor getting its military involved in the bloody fighting in Syria. But some surveys also indicate that the public feels that Washington would be justified in using military action against Damascus if there was proof the Syrian regime used chemical weapons against their own people.
Sixty-one percent of those questioned in a Quinnipiac survey conducted in late June and early July said that it was not in the national interest for the U.S. to be involved in the war in Syria. And nearly six in 10 said they opposed the U.S. sending military arms or supplies to the rebel forces fighting the regime of Syrian President Bashar al-Assad. Those findings were consistent with earlier surveys from Gallup, Pew Research Center, and CBS News/New York Times that were conducted in June.
"In past foreign crises, polls have shown that support for U.S. action changes depending on three things: whether ground troops might become involved, whether the U.S. is acting alone or as part of an international coalition, and whether there is a specific reason to use U.S. force. The reason may be forward-looking or in retaliation for something that already happened, but the public doesn't like writing blank checks," says CNN Polling Director Keating Holland.
But factor in chemical weapons, and public opinion shifts.
In May, a CNN/ORC Poll asked, "If the United States were able to present evidence that convinced you that the Syrian government has chemical weapons and has used them to kill civilians in that country, do you think the U.S. would or would not be justified in using military action against the Syrian government?"
Two thirds of those questioned answered yes, with three in 10 saying no.
An ABC News/Washington Post poll from last December had similar results, with more than six in 10 supporting military action Syria if it used chemical weapons against its people.
The United States has concluded Syria carried out chemical weapons attacks against its people, Obama said Wednesday, a claim that comes amid a looming diplomatic showdown over whether to strike against al-Assad's government.
"We do not believe that, given the delivery systems, using rockets, that the opposition could have carried out these attacks. We have concluded that the Syrian government in fact carried these out," Obama told "PBS NewsHour."
"If, in fact, we can take limited, tailored approaches, not getting drawn into a long conflict, not a repetition of, you know, Iraq, which I know a lot of people are worried about – but if we are saying in a clear and decisive but very limited way, we send a shot across the bow saying, stop doing this, that can have a positive impact on our national security over the long term," the president added.
One limited military option is cruise missile attacks against Syrian government and military targets.
According to the Quinnipiac poll, Americans by a 49%-38% plurality said the U.S. should use weapons that don't risk the lives of American forces, such as cruise missiles or drones, to attack Syrian government targets.
"After the Vietnam war, Americans were much less likely to support the use of U.S. force, a phenomenon often referred to as the Vietnam syndrome," Holland added. "Will Americans suffer from an Iraq syndrome in future conflicts? We may get an answer to that question in the next few weeks."