Typical poll designed to produce a specific result. Background checks ARE required for all commercial sales. What the Left wants is to turn private sales occurring at a gun show into "commercial" sales by virtue of the gun show advertising. Such dishonesty is disappointing in politics and in the media.
It is so poorly worded that I can't give an answer. Technically, I want background checks, as long as they are free and individuals can simply call NICS--what I will fight tooth and nail is 4473 documentation and transfer fees for every sale. When the terminology is already known to be intentionally misleading, how are we to know that "background checks" do not include 4473 forms and fees instead of just a NICS check as implied?
This is how they make their enemies look unreasonable. I'm sure 90% of Americans support broader background checks in order to prevent sales to a felon or lunatic, but not if that includes due facto gun registration and transfer fees, which would decimate the private market.