The War on Drugs was started by Nixon in the 1970's as a way of controlling the drug love protestors of his ideals. Since then, the rate of people that have been put in jail or prison (they're different things) has skyrocketed and Nixon's successors have not done anything to end it.
Once Reagan came into office, he escalated the War on Drugs even further, incarcerating even more people. (mostly minorities) His wife Nancy started the famous "Just Say No" campaign, and LAPD chief started the infamous DARE program, which was accepted quickly. There were other ways that it was enforced. People were lead to believe that drug abuse was a major problem in the United States.
George W. Bush took the War on Drugs literally, and used violence on drug users. Thousands of SWAT raids for drug-related offences happened, and then there's the Mexican Drug Cartels.
However, unlike his predecessors, Obama has both admitted to drug use in his younger years and seems to be more progressive on drug use, including the announcement of a video about the failings of the drug war. Despite this, there are still violent actions against drug users and high incarceration of them.
Anyway, the point is, is Nixon's War On Drugs ever going to end? If it ends, it would mean surrendering to the drugs and declaring them the winner. Could Americans accept that? How exactly could an ending happening? Marijuana is legal in two states for fun and a few others for medicine, and has a reasonable chance of getting to be as widely accepted as alcohol. Harder drugs have no chance of being legal, so Dr. Feelgood's Cocaine Emporium (not sure where I first saw that used, but apologies to whoever used it first) still will be in business.
So, War on Drugs, will we finally surrender to the drugs? Or will it always be around, with the government always trying to incarcerate everyone who uses them?