The federal legal age for purchasing tobacco products has been increased from 18 to 21 in a move the American Lung Association said will “reduce youth access to tobacco products and help save lives.”

That provision, part of a $1.4 trillion spending bill which President Donald Trump signed into law on Friday, would apply not only to traditional tobacco products such as cigarettes and cigars, but also to e-cigarettes—products that have lately been caught in regulatory cross-hairs, sparked by rising rates of use among teenagers. [...]