Doing a search on Federal gun prosecutions will reveal that gun related prosecutions have been falling under Obama. Felons in possession of firearms are not being prosecuted unless they are caught in the act of committing a crime. You can check the link below about Milwaukee officials complaining the Feds are rejecting cases and how much the prosecution rates for gun crimes have fallen. There are similar stories from just about each year after Obama took office.

I'm a bit perturbed that all we hear about is expanding background checks and denying firearm purchases for those on no-fly lists, when Federal prosecutors have been instructed by the DOJ to let felons who possess firearms walk.

Federal Gun Prosecutions Down