In 2015, large majorities of American adults, both Republicans (79%) and Democrats (88%), supported background checks for private sales and at gun shows, according to a Pew Research Center survey. In 2017, strong majorities of American adults, both gun owners (77%) and non-gun owners (87%), supported background checks for private sales and at gun shows, according to a Pew Research Center survey with an error attributable to sampling of +/- 2.8% at the 95% level of confidence. In 2018, after the Stoneman Douglas High School shooting in Parkland, Florida, nearly all Americans supported universal background checks. 88% of registered voters supported universal background checks, according to a "Politico"/Morning Consult poll with a margin of error +/- 2%. 94% of American voters supported universal background checks, according to a Quinnipiac University Polling Institute poll with a margin of error of +/- 3.4%.