Same-sex unions have been on the political radar in the United States since the Hawaii Supreme Court ruled in 1993 that denying licenses to same-sex partners violated the Hawaii constitution unless there is a "compelling state interest." In 2003, the U.S. Supreme Court's decision in Lawrence v. Texas paved the way for same-sex marriage to emerge as a hot-button political issue. Since Massachusetts became the first state to legalize same-sex marriage in 2004, other states have rushed to either restrict or liberalize their own marriage laws.