Bloomberg is at it again, not that he ever stopped.
CNN Video
"A dealer can take all of his or her inventory and go to a gun show and sell it without the background checks."
He didn't use his wonderful "private dealer" nomenclature either, but flat out said that dealers have to conduct background checks at gun stores, but "at guns shows, explicitly, there is no requirement to do background checks".
We really should just start hanging liars.