regarding North Korea, which, in his view, "is the biggest threat in the world today," stating "...one of these days, one of their ICBMs is going to work." However, he does support waging war for humanitarian reasons. Civil liberties Johnson has been a strong supporter of civil liberties and has received the highest score of any candidate from the American Civil Liberties Union for supporting drug decriminalization while opposing censorship and regulation of the Internet, the Patriot Act, enhanced airport screenings, and the indefinite detention of prisoners. He has spoken in favor of the separation of church and state, and has said that he does not "seek the counsel of God" when determining his political agenda. Johnson endorsed same-sex marriage in 2011; he has since called for a constitutional amendment protecting equal marriage rights, and criticized Obama's position on the issue as having "thrown this question back to the states." Johnson supports the enforcement of Protected Classes that was established by the Civil Rights Act of 1964, and believes that providers should be prohibited from discriminating between customers based on demographics, such as race or sexuality. This differentiated him from his Libertarian Party opponents in the party primary, especially Austin Petersen. He has been a longtime advocate of legalizing marijuana and has said that if he were president, he would remove it from Schedule I of the Controlled Substances Act as well as issue an executive order pardoning nonviolent marijuana offenders. Johnson has stated that he would pardon NSA whistleblower Edward Snowden. He believes that decriminalizing sex work should be left up to the states, but has said that prostitutes are more "at risk" in an illegal environment. Abortion Johnson supports abortion access. He has stated he believes that "it's the woman's choice." His 2016 position page on abortion states the "woman must be allowed to make decisions about her own health" and "government should not be in the business of second guessing". Immigration Johnson supports comprehensive immigration reform and has criticized the immigration stances of Obama, Trump and Hillary Clinton. In his 2012 campaign, he summed up his proposals as simplifying legal immigration while tackling illegal immigration. Johnson proposes "eliminating categories and quotas" and offering illegal immigrants without criminal records in the U.S. a path to legal status. In 2012, he called walls ineffective in stopping illegal immigrants and argued that the U.S. should instead work on tackling Mexican