it's another gift to american mafiagovernement from italian mafiagovernement

Italy was united by Freemasons who coincidently also founded the Mafia at the same time.
There are too many banks in italy and they launder a lot of money.
The Mafia is not alone in it's habit of not paying tax, as well as prositution, drugs and all the
usual criminal activities they also control the illegal trade in toxic waste, like they get shot of it v fast.
They control mining, how much for that mountain mate ?
Italy's economy has big problems , industry is in a crisis, tourism is dropping off and agriculture is fucked.
Funny then that every three months or so up pops another bank ! they are everywhere .
A small town of 25.000 people can have 30 or 40 banks in the UK you won't find more than four or five in a similar sized town.

You don't understand much about the US apparently.

We might make something ILLEGAL on a national basis but very unlikley to make something LEGAL for the country as a whole. I guess I need to give some examples besides betting.

When "prohibition" ended that didn't make drinking legal everywhere. States could prohibit drinking if they wanted to and in fact the way it was done, left up to a county by county basis. So yes Virginia, there ARE "dry counties" in the US.

Betting is not legal in all states. The lotteries are creatures of my lifetime. Even states that have horse racing might not have legal "off track betting". When I was a kid, the only state that was "wide open" was Nevada (but prostittuion is legal there too -- still the only state for that). How on earth are you able to make sense out of a musical like "Guys and Dolls" if you thought betting was legal here?

Of course the practicality of stopping illegal betting is another matter. And of course, potential tax revenues from legaizing it. The same may be said for prostitution, "drugs" (hey, also get to reduce crime if drugs are legal/affordable) and a whole host of other activities that large numbers of people here think undesireable.