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Marijuana was first restricted in the United States on the federal level in 1937, with [[Franklin Delano Roosevelt]]'s signing of the 1937 Marihuana Tax Act.<ref name="Kidd1970">{{cite book|author=Jeannette Kidd|title=Marihuana Tax Act of 1937: Its Causes and Effects|url=https://books.google.com/books?id=DStZAAAAMAAJ|year=1970|publisher=University of Wisconsin--Madison|page=57}}</ref> On May 19, 1969, the Supreme Court declared the Marihuana Tax Act unconstitutional due to illegal self-incrimination, a violation of the Fifth Amendment, in the case of Leary v. United States.<ref>https://supreme.justia.com/cases/federal/us/395/6/#tab-opinion-1948101</ref>  As a result, President Richard Nixon signed into law the Controlled Substances Act on October 27, 1970, renewing the ban on marijuana.<ref>https://www.deadiversion.usdoj.gov/21cfr/21usc/811.htm</ref>  From 1973 to 1978, several US states "decriminalized" marijuana, meaning that they would not enforce state laws against minor marijuana use and possession. This began with Oregon, and was joined with Alaska, California, Minnesota, Mississippi, North Carolina, and Nebraska.<ref name="Dufton2017">{{cite book|author=Emily Dufton|title=Grass Roots: The Rise and Fall and Rise of Marijuana in America|url=https://books.google.com/books?id=Qo6YDgAAQBAJ|date=5 December 2017|publisher=Basic Books|isbn=978-0-465-09617-6}}</ref> In 1996 in California, a voter referendum legalized the use of marijuana for medical usages, allowing it to be used for any condition for which a patient presented a doctor's recommendation.<ref>{{cite news|last1=Balzar|first1=John|title=Voters Approve Measure to Use Pot as Medicine|url=http://articles.latimes.com/print/1996-11-06/news/mn-62740_1_voters-approve-measure|accessdate=February 9, 2018|work=Los Angeles Times|date=November 6, 1996}}</ref>  [[Arizona]] also passed a medical cannabis ballot measure, but it was rendered ineffective on a technicality.<ref>{{citation|title=State-By-State Medical Marijuana Laws|url=https://www.mpp.org/issues/medical-marijuana/state-by-state-medical-marijuana-laws/state-by-state-medical-marijuana-laws-report/|publisher=Marijuana Policy Project|date=December 2016}}</ref> Other states followed, and in 2014 Utah became the first state to legalize only some derivatives of marijuana, not the full drug itself.<ref>{{cite news|title=First-of-its-kind medical marijuana law signed in Utah|url=https://www.rt.com/usa/utah-charlees-law-marijuana-409/|accessdate=February 10, 2018|work=RT|date=March 26, 2014}}</ref> In 2012, Washington and Colorado "legalized" recreational marijuana by voter initiative;<ref>https://www.foxnews.com/opinion/2012/11/07/psychological-impact-legalizing-marijuana.html</ref> by early 2018 the number of recreational legal states reached nine with the addition of Vermont.<ref>https://www.reuters.com/article/us-vermont-marijuana/vermont-senate-passes-bill-to-legalize-marijuana-use-idUSKBN1EZ2KS</ref>

Marijuana was first restricted in the United States on the federal level in 1937, with [[Franklin Delano Roosevelt]]'s signing of the 1937 Marihuana Tax Act.<ref name="Kidd1970">{{cite book|author=Jeannette Kidd|title=Marihuana Tax Act of 1937: Its Causes and Effects|url=https://books.google.com/books?id=DStZAAAAMAAJ|year=1970|publisher=University of Wisconsin--Madison|page=57}}</ref> On May 19, 1969, the Supreme Court declared the Marihuana Tax Act unconstitutional due to illegal self-incrimination, a violation of the Fifth Amendment, in the case of Leary v. United States.<ref>https://supreme.justia.com/cases/federal/us/395/6/#tab-opinion-1948101</ref>  As a result, President Richard Nixon signed into law the Controlled Substances Act on October 27, 1970, renewing the ban on marijuana.<ref>https://www.deadiversion.usdoj.gov/21cfr/21usc/811.htm</ref>  From 1973 to 1978, several US states "decriminalized" marijuana, meaning that they would not enforce state laws against minor marijuana use and possession. This began with Oregon, and was joined with Alaska, California, Minnesota, Mississippi, North Carolina, and Nebraska.<ref name="Dufton2017">{{cite book|author=Emily Dufton|title=Grass Roots: The Rise and Fall and Rise of Marijuana in America|url=https://books.google.com/books?id=Qo6YDgAAQBAJ|date=5 December 2017|publisher=Basic Books|isbn=978-0-465-09617-6}}</ref> In 1996 in California, a voter referendum legalized the use of marijuana for medical usages, allowing it to be used for any condition for which a patient presented a doctor's recommendation.<ref>{{cite news|last1=Balzar|first1=John|title=Voters Approve Measure to Use Pot as Medicine|url=http://articles.latimes.com/print/1996-11-06/news/mn-62740_1_voters-approve-measure|accessdate=February 9, 2018|work=Los Angeles Times|date=November 6, 1996}}</ref>  [[Arizona]] also passed a medical cannabis ballot measure, but it was rendered ineffective on a technicality.<ref>{{citation|title=State-By-State Medical Marijuana Laws|url=https://www.mpp.org/issues/medical-marijuana/state-by-state-medical-marijuana-laws/state-by-state-medical-marijuana-laws-report/|publisher=Marijuana Policy Project|date=December 2016}}</ref> Other states followed, and in 2014 Utah became the first state to legalize only some derivatives of marijuana, not the full drug itself.<ref>{{cite news|title=First-of-its-kind medical marijuana law signed in Utah|url=https://www.rt.com/usa/utah-charlees-law-marijuana-409/|accessdate=February 10, 2018|work=RT|date=March 26, 2014}}</ref> In 2012, Washington and Colorado "legalized" recreational marijuana by voter initiative;<ref>https://www.foxnews.com/opinion/2012/11/07/psychological-impact-legalizing-marijuana.html</ref> by early 2018 the number of recreational legal states reached nine with the addition of Vermont.<ref>https://www.reuters.com/article/us-vermont-marijuana/vermont-senate-passes-bill-to-legalize-marijuana-use-idUSKBN1EZ2KS</ref>

Marijuana is a [[Schedule I]] [[Controlled Substance]] in the United States of America, meaning that it is illegal under federal law of the United States,  and considered to have no redeemable medical value. According to the FBI, in 2012, there were 658,000 arrests for marijuana possession compared with 256,000 for cocaine, heroin and their derivatives.<ref name=nyt>{{cite news|url=https://www.nytimes.com/interactive/2014/07/27/opinion/sunday/high-time-marijuana-legalization.html?_r=0|title=Repeal Prohibition, Again|work=New York Times|date=July 26, 2014|accessdate=July 27, 2014}}</ref> Presidential debates between [[Hillary Clinton]] and [[Bernie Sanders]] for the [[United_States_presidential_election,_2016#Democrat_primaries|2016 Democratic party presidential nomination]] focused on downgrading marijuana from a Schedule 1 controlled substance to total lefalization.

Marijuana is a [[Schedule I]] [[Controlled Substance]] in the United States of America, meaning that it is illegal under federal law of the United States,  and considered to have no redeemable medical value. According to the FBI, in 2012, there were 658,000 arrests for marijuana possession compared with 256,000 for cocaine, heroin and their derivatives.<ref name=nyt>{{cite news|url=https://www.nytimes.com/interactive/2014/07/27/opinion/sunday/high-time-marijuana-legalization.html?_r=0|title=Repeal Prohibition, Again|work=New York Times|date=July 26, 2014|accessdate=July 27, 2014}}</ref> Presidential debates between [[Hillary Clinton]] and [[Bernie Sanders]] for the [[United_States_presidential_election,_2016#Democrat_primaries|2016 Democratic party presidential nomination]] focused on downgrading marijuana from a Schedule 1 controlled substance to total legalization.<ref>https://www.cnn.com/2015/10/13/politics/pot-hillary-clinton-bernie-sandersM</ref>

Many liberals have advocated for decriminalization, including National Organization for the Reform of Marijuana Laws, Marijuana Policy Project, and Law Enforcement Against Prohibition.<ref>[http://www.leap.cc Law Enforcement Against Prohibition]</ref><ref>http://www.lp.org/issues/lp-oss.shtml</ref> On July 26, 2014, the ''New York Times'' published an editorial calling for removing federal controls over marijuana for people 21 and older, leaving the question to individual states.<ref name=nyt/> Many [[American]] [[conservative]]s, especially social conservatives, oppose legalization of marijuana in any form due to its perceived harmful medical and psychological effects and its likelihood of harm to third parties due to drug-related crime and reckless driving. A few libertarian-leaning conservatives, most notably [[Ron Paul]], [[William F. Buckley]], and [[Larry Elder]], have advocated the decriminalization of this drug. Some [[liberal]]s support legalization, but most instead advocate for drug treatment and rehabilitation. [[Libertarian]]s are usually the biggest supporters of marijuana legalization. [[Gary Johnson]], a former Republican and 2012 Libertarian Party Presidential candidate for president, is the highest-ranking US politician to advocate for marijuana legalization. He was a two-term Governor of [[New Mexico]].

Many liberals have advocated for decriminalization, including National Organization for the Reform of Marijuana Laws, Marijuana Policy Project, and Law Enforcement Against Prohibition.<ref>[http://www.leap.cc Law Enforcement Against Prohibition]</ref><ref>http://www.lp.org/issues/lp-oss.shtml</ref> On July 26, 2014, the ''New York Times'' published an editorial calling for removing federal controls over marijuana for people 21 and older, leaving the question to individual states.<ref name=nyt/> Many [[American]] [[conservative]]s, especially social conservatives, oppose legalization of marijuana in any form due to its perceived harmful medical and psychological effects and its likelihood of harm to third parties due to drug-related crime and reckless driving. A few libertarian-leaning conservatives, most notably [[Ron Paul]], [[William F. Buckley]], and [[Larry Elder]], have advocated the decriminalization of this drug. Some [[liberal]]s support legalization, but most instead advocate for drug treatment and rehabilitation. [[Libertarian]]s are usually the biggest supporters of marijuana legalization. [[Gary Johnson]], a former Republican and 2012 Libertarian Party Presidential candidate for president, is the highest-ranking US politician to advocate for marijuana legalization. He was a two-term Governor of [[New Mexico]].