In most US states, there is something called an Initiative where people can put laws on the ballot and directly vote them into place. All politicians are afraid of the NRA. The NRA is more zealous than Hamas or Hezbollah and selling guns is their religion. Only if gun owners rise up and enact something via initiative will anything happen. That has the proverbial snowball's chance in hell.
World Jewish Congress: Nazi train treasures must go to rightful owners (Reuters)
from the article: Obama and Romney remain quiet on gun control following Colorado shooting