The newest scheme being pushed is the closure of the "Terror Gap". As marketed by the gun-controllers, this will "Prevent Sales Of Guns To Terror Suspects". And what is a "Terror Suspect"?
Ted Kennedy was a "Terror Suspect". So are countless other people who have done absolutely nothing. The closing of the Terror Gap is essentially the elimination of due process. People who have committed no crime will be denied their Second Amendment rights. They will not be notified if they are on the list. They cannot petition the government to know if they are on the list. Most of the people on the list will never know they are on the list.
If the gun controllers really have a problem with suspected terrorists buying guns, why not do the intellectually honest thing and arrest them? If you can't trust someone to buy a gun or ride on a plane, you can't trust them to buy gasoline, a moving van, or a bag of fertilizer. You can't trust them to walk free, period. So arrest every person on the list, put them on trial, and use our system of due process to determine whether they should walk free with all their rights intact or stay locked up.
I don't endorse the above, because I think the concept of "secret watch lists" is completely useless in preventing terrorist acts (See: Fort Hood). But at least it would show that the gun controllers are actually concerned about potential terrorists and not just guns (as usual).