in the senate, wilson supported the strategic defense initiative and the civil liberties act of 1988, while he opposed the omnibus budget reconciliation act of 1990. he resigned from the senate after winning the 1990 california gubernatorial election. as governor, he signed a three-strikes law and supported energy deregulation and term limits. he was also an advocate for california proposition 187, which established a state-run citizenship screening system with the intention of preventing illegal immigrants from using social services. he sought the presidential nomination in the 1996 republican primaries but quickly dropped out of the race.