Obama's four proposals: Universal background checks, gun tracing, high cap mags, assault weapon ban

Of course, we have tried three of these four programs previously with no evidence of success.  Even the background checks have been tried, though not universal checks.  Still one would expect if background checks on almost all guns didn't help, why should it matter to expand it slightly.  Obviously, that is the reason for the grossly exaggerated claim that 40% of gun sales are done without background checks -- they want to make it appear as it this law would make a big difference.  From Politico:

The White House told gun-control advocates Tuesday that President Barack Obama’s wide-ranging gun control proposals will include a new federal gun trafficking law — long sought by big-city mayors as a way to keep out-of-state guns off their streets. 

The proposal, which has not been discussed in detail by the White House up until now, will be unveiled Wednesday, along with Obama’s call for universal background checks for all new gun purchases, as well as new bans on assault weapons and high-capacity ammunition magazines, according to a person who was in the room for the presentation to gun control advocates. . . .