Some health groups point to early research that indicates smoking and vaping can make COVID-19 symptoms worse.
Regulatory changes would face a process that could take years and face litigation.
British American Tobacco's $47 billion bid to take over Reynolds American signals the U.S. cigarette market is still very profitable.
One company offers growers a way to raise the dye plant instead.
Critics say not enough of the money goes to smoking prevention programs.
