That's the percentage of people in a new Quinnipiac University national poll who say they support "requiring background checks for all gun buyers." If you asked people whether water is wet, you might not get 97% of them to say that it is. Democrats (99%), Republicans (97%), independents (98%), men (96%), women (98%), 18- to 34-year-olds (99%) and those 65+ (98%) all overwhelmingly support making a background check a requirement for anyone trying to purchase a gun.
Source: CNN February 20, 2018 21:22 UTC