A moderate Republican, Horn won his Democratic-leaning district with relative ease four more times. In 1994 he rode the Republican tide to an easy victory over a weak opponent. In 1996, his reelection was eased when he became the only Republican west of the Mississippi River to be endorsed by the Sierra Club; In 1998 he once again bested his 1994 foe despite a strong year for Democrats statewide in California. Only in 2000 did he have a close race, beating Democrat Gerrie Schipske by less than 1 percent.