Unless you allow those of us who are actually sane and want to solve problems to commit the mentally ill to confinement in asylums, you aren't going to solve your problem. Background checks are already in place for over ninety percent of sales, a hundred percent in some places like California which requires full background checks for not only ALL firearms purchases, but ammo purchases as well. Since California has already had 49 mass shootings THIS YEAR, the background checks don't seem to have accomplished anything except inconvenience law-abiding citizens. Illinois requires ANY firearms purchaser to have a Firearm Owner's Identification Card (FOID) issued by the state before ANY firearms purchase. The seller is required to call and verify they status of the card. Illinois has had the most mass shootings in the nation this year at 57. So, tell us again how universal background checks are going to do anything when the states that already have them are the leaders in mass shootings?