The FDA regulates nicotine sold for human consumption regardless of the source, but just recently it also got power over tobacco products. As far as the FDA is concerned, nicotine is nicotine just like to the ATF alcohol is alcohol. It doesn't matter where it came from. The only question is whether the product is regulated as a drug or a tobacco product. If nicotine starts to be sourced from another plant, the FDA would still figure out a way to regulate it. The public believes nicotine is as "addictive as hero-n" and the ANTZ are convincing them that people will start with nicotine in e-cigarettes and graduate to smoking. As long as people believe those lies then nicotine will not be considered a safe product and will easily be restricted by the FDA with public support. The only way we can change this belief is to get the truth out that smokeless tobacco is no more deadly than sucking on coffee beans or tea leaves and should be treated like those products, not like inhaled combustible products. Once the public loses it's fear of tobacco "in general," then the door will be open to other smokeless nicotine use in forms like e-cigarettes. But so long as the public thinks all tobacco/nicotine use is equally hazardous and the ultimate goal is abstinence, e-cigarettes will be guilty by association.