The source worded the question as follows: "If airstrikes aren't enough to stop ISIS, would you favor or oppose sending U.S. ground troops to Iraq to fight against ISIS?"
The percentage does not add up to 100 percent due to figures for "no answer/ no opinion" not provided by the source.
Citation formats
Support and opposition regarding U.S. ground forces in the fight against ISIS 2014
The statistic shows the results of a survey conducted in 2014 in the United States about the deployment of ground forces following failure to stop ISIS with airstrikes. In 2014, 57 percent of respondents stated that they would oppose sending in ground forces to fight ISIS.
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Brookings Institution. (January 8, 2015). United States: If airstrikes fail to stop ISIS, would you oppose or support sending in ground troops? [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved July 15, 2026, from /statistics/379282/support-opposition-u-ground-forces-against-isis/
Brookings Institution. "United States: If airstrikes fail to stop ISIS, would you oppose or support sending in ground troops?." Chart. January 8, 2015. ÌÇÐÄÆƽâ°æ. Accessed July 15, 2026. /statistics/379282/support-opposition-u-ground-forces-against-isis/
Brookings Institution. (2015). United States: If airstrikes fail to stop ISIS, would you oppose or support sending in ground troops?. ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: July 15, 2026. /statistics/379282/support-opposition-u-ground-forces-against-isis/
Brookings Institution. "United States: If Airstrikes Fail to Stop Isis, Would You Oppose or Support Sending in Ground Troops?." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 8 Jan 2015, /statistics/379282/support-opposition-u-ground-forces-against-isis/
Brookings Institution, United States: If airstrikes fail to stop ISIS, would you oppose or support sending in ground troops? ÌÇÐÄÆƽâ°æ, /statistics/379282/support-opposition-u-ground-forces-against-isis/ (last visited July 15, 2026)
United States: If airstrikes fail to stop ISIS, would you oppose or support sending in ground troops? [Graph], Brookings Institution, January 8, 2015. [Online]. Available: /statistics/379282/support-opposition-u-ground-forces-against-isis/
