evidence: The most recent poll that we found was conducted March 6-8, just before the House vote, by Morning Consult/Politico. Registered voters polled online were asked: "To what extent do you support or oppose the following — requiring background checks for all gun purchasers?" Those who said they strongly or somewhat support such a measure totaled 84%. [...] Sept. 2-5: "Would you support or oppose requiring background checks on all potential gun buyers, including private sales and gun shows?" Support: 89%. [...] Aug. 21-26: "Do you support or oppose requiring background checks for all gun buyers?" Support: 93% (92% to 94% in three other polls between January and May.)