The "Muslim Ban" refers to a series of executive orders issued by former President Donald Trump starting in January 2017. These orders aimed to restrict travel from several predominantly Muslim countries, citing national security concerns. The initial ban faced widespread criticism and legal challenges, leading to revisions and a final version that included specific countries. The countries affected by the ban included Iran, Iraq, Libya, Somalia, Syria, and Yemen. The policy sparked debates about religious discrimination, immigration policy, and civil rights in the United States. Ultimately, the ban was upheld by the Supreme Court in 2018, but it remained a contentious issue.