Wyden personally opposes assisted suicide and stated he voted against the Oregon Death with Dignity Act, first enacted in Oregon in 1997, each time it appeared on the ballot by voter referendum. However, Wyden successfully blocked congressional attempts to pass federal legislation to override Oregon's law. In 2000, Wyden blocked attempts in Congress to overturn the Oregon assisted-suicide law by threatening a filibuster. In 2001, Wyden wrote to President George W. Bush urging him to not alter the law through federal executive action. In 2005, he and four other Democratic members of Oregon's congressional delegation filed an amicus brief in the Supreme Court case of "Gonzales v. Oregon" in support of the State of Oregon, and praised the eventual decision to uphold the law. In 2006, Wyden informed Senate leadership that he would block legislation overturning the Death with Dignity Act. Wyden said in 2009 that he will continue to "fight tooth and nail" to block new federal attempts to block the law.