Washington (CNN) – Support for the war in Afghanistan has dipped below 20%, according to a new national poll, making the country's longest military conflict arguably its most unpopular one as well.

The CNN/ORC International survey released Monday also indicates that a majority of Americans would like to see U.S. troops pull out of Afghanistan before the December 2014 deadline....

"Those numbers show the war in Afghanistan with far less support than other conflicts," CNN Polling Director Keating Holland said. "Opposition to the Iraq war never got higher than 69% in CNN polling while U.S. troops were in that country, and while the Vietnam War was in progress, no more than six in 10 ever told Gallup's interviewers that war was a mistake."...