Keep in mind, that it is unlikely that the Wisconsin legislature will reconvene before the November elections.
It's not about WI legislation (this time around). According to the article in the J-S, linked to in the original post, they're talking about "Federal" legislation this time.
So if (God forbid) they did get a federal law passed, who will do the BC checks? FFLs? NICS is free of charge by federal statute, but FFLs will likely treat these checks as they now do transfers from out-of-state purchases, and charge a fee.
Federal gun laws supposedly are constitutional because they fall under the "interstate commerce clause" (whatever the hell that is). All interstate gun transactions currently require background checks. Any new federal legislation would need to specify that all transactions, even the currently "off-limits" to background check requirements of inTRAstate sales would now fall under "interstate commerce" too. Intrastate means "within the state"... how does interstate commerce give feds the right to legislate intrastate matters? Just because a firearm may have been "covered" because it was made in another state, and it fell under fed jurisdiction when it was transfered across state lines, does that mean it's a perpetual thing? If it doesn't cross state lines when transfering ownership, the feds should have no jurisdiction... it would seem. But I'm sure it's not that simple. Of course not... why should our laws make sense?