Most Americans support common sense types of gun control, such as background checks at gun shows. But bolstered by the cash and cutthroat reputation of the NRA, gun expansionists have beaten off all attempts to expand federal gun regulations. In many cases, like the riders to the budget to reduce the Federal Government's ability to track gun violence, the NRA has actually decreased controls on gun sales.
NOTE (10 April 2013): An deal may be in the works to allow increased background checks during gun show sales and gun sales through other venues.