[cnn-photo-caption image= http://i2.cdn.turner.com/cnn/2009/POLITICS/09/02/afghanistan.support/art.soldiersafghan1.gi.jpg
caption="U.S. soldiers patrol an area of Afghanistan in July. The U.S. now has about 62,000 troops in the country"]
WASHINGTON (CNN) - While support for the war in Afghanistan has been falling, most experts think Americans will give President Obama the benefit of the doubt - at least for another year.
A CNN/Opinion Research Corp. poll released Tuesday showed that opposition to the war increased 11 percentage points since April to 57 percent.
Last month was the deadliest for U.S. troops since the war started as retaliation for the September 11, 2001, terror attacks. And the military strategy is still a work in progress, with top commanders using words like "dire" to sum up the current status of the war.
But national security experts think it will still be a while before a clamor arises for a pullout.
Michael O'Hanlon, national security expert at the Brookings Institution, a nonpartisan think tank, said he believes Americans will make a serious assessment at the end of 2010 as to whether a pullout is necessary.
"If we can't show progress by that point, then I think people's patience will start to run out," he said. "It's already running out, but I think people will swallow their doubts and give this strategy time if they are convincingly told why more time is needed and why it would make a difference."
Polls, another expert said, are not an accurate gauge for how long Americans - including politicians - will still support involvement in Afghanistan.
Follow Ed Hornick on Twitter @HornickCNN