If the FDA can't ban "e-cigarettes" then why does the DEA get to ban marijuana inhaled via a vaporizer?

Question by _______: If the FDA can't ban "e-cigarettes" then why does the DEA get to ban marijuana inhaled via a vaporizer?
A) If marijuana is considered a "drug" (as opposed to a "natural plant") then why isn't the proven beyond a shadow of a doubt addictive nicotine not also considered a drug?

B) The description of this e-cigarette product sounds VERY similar to the way some people consume marijuana now: "battery-powered products that allow users to inhale nicotine vapor (insert THC vapor

E-Cig Reviews