During his 2008 presidential campaign, Barack Obama promised to support a path to citizenship for undocumented immigrants, whereby such immigrants, if they were in good standing, could pay a fine in return for gaining the opportunity to become citizens. In 2013, Obama called on Congress to include a path to citizenship in any immigration reform bill it passed. The Border Security, Economic Opportunity, and Immigration Modernization Act of 2013, passed by the United States Senate on June 27, 2013, would create a 13-year path to citizenship for millions of undocumented immigrants, a path that would require them to pass several security checks before they can get a green card.