"If he wants to stop smoking, instead of a tax -- he should propose a bill that outlaws tobacco sales and use in his state."
Neither of these will work. The final result of such actions will be that the tobacco trade will move into the underground economy, as was the case during the Prohibition ban on alcohol. The Mafia will just LOVE IT!!!!
Tobacco is legal, it should stay that way.
I don't think it should be taxed either.
I don't use, but I don't care if others kill themselves using it.
If we take a long term view, even under the present system, even though the government may choose to subsidize some short-term healthcare costs for these folks, in reality they're gonna die young and save the taxpayer money overall.