Edit: Hemp-derived Delta 8 THC was legal until 8/21/20 thanks to the 2018 Farm Bill

The fuss about THC has always been aboutΔ9 (delta 9) THC.  It’s responsible for the high in marijuana.   Δ8(delta 8) THC is a very similar molecule that is present only in small quantities in most cannabis. Resourceful chemists have recently found a way to create Δ8THC from hemp.