How are you going to get guns from gangs who all have them and all the survivalists who have them just to mention a couple? Would you have the military go door to door breaking them down and searching, killing anyone who objects? Exactly who is it that obeys laws. Out of all the hundreds of millions of guns owned in this country how many of them have been uses for mass murder? In the past 20 years gun ownership has doubled but murders have dropped by about half. If we change the 2nd amendment, how long before the 1st amendment gets repealed? Do you want to set Trump up as a dictator never to be voted out, you really like him that much?