California Proposition 8 and Same-Sex Marriage Ban

Category: History & Politics
Key figures: Gavin Newsom (Mayor of San Francisco), California Attorney General Jerry Brown, Chief Justice Ronald George (California Supreme Court); campaign organizations: Equality California (No on 8), ProtectMarriage.com (Yes on 8)

Summary

California’s Proposition 8, passed on November 4, 2008 — the same day as the Barack Obama presidential election — was a constitutional amendment that reversed the state’s May 2008 legalization of same-sex marriage and banned it until a federal court ruling took effect in June 2013. The amendment passed with 52.3% of the vote (about 7.0 million yes to 6.4 million no), making California the first U.S. state to pass a same-sex marriage ban via ballot initiative after previously permitting it. The two sides raised roughly $83 million combined, making it the most expensive social-issue ballot measure in U.S. history to that point; the pro-ban “Yes on 8” campaign raised about $39.9 million and was narrowly outraised by the “No on 8” opposition. Proposition 8 became a defining symbol of the cultural politics of 2008–2015, sparking nearly a decade of litigation, the landmark federal case Perry v. Schwarzenegger, and ultimately its own reversal in 2013–2015.

Significance

Proposition 8 represents a watershed moment in American LGBTQ history and reveals the deep regional and generational divides over marriage equality that defined early-21st-century American culture. Passed the same day voters elected the nation’s first African American president, Prop 8 demonstrated that social-conservative ballot initiatives could still mobilize voters even in California, the nation’s most populous and culturally progressive state. Conversely, the four-year legal and electoral fight against Prop 8 became the crucible that transformed national opinion and strategy around marriage equality — the litigation produced the Perry v. Schwarzenegger decision (2010), which declared the ban unconstitutional but was later stayed on appeal, ultimately enabling the Obergefell v. Hodges (2015) Supreme Court ruling legalizing same-sex marriage nationwide.

The Prop 8 campaign revealed the power of ballot-measure organizing and the religious/cultural coalition that opposed marriage equality. It also became a turning point for marriage-equality advocates: the 2008 defeat prompted a strategic pivot toward federal litigation and accelerated shifting public opinion (52% opposed SSM nationally in 2008; 61% supported it by 2014). The campaign’s failure to prevent marriage re-legalization in 2013–2015 signaled the end of the ballot-measure era of anti-LGBTQ politics and prefigured the Obergefell decision.

Key Dates & Chronology

Background: In re Marriage Cases (May 15, 2008)

On May 15, 2008, the California Supreme Court ruled in In re Marriage Cases (4–3 decision) that same-sex couples have a constitutional right to marry under the California Constitution. Chief Justice Ronald George wrote that denying marriage to same-sex couples violated the constitutional guarantee of equal protection and was a form of sex discrimination. The ruling took effect June 16, 2008, making California the second state (after Massachusetts, 2004) to legalize same-sex marriage. Approximately 18,000 same-sex couples married in California in the six months before Prop 8’s passage.

The In re Marriage Cases decision triggered an immediate political response: conservative and religious organizations began gathering signatures for a constitutional amendment to overturn the court’s ruling. Proponents collected over 1 million signatures (1.3 million), well exceeding the 694,354 required, and Proposition 8 was placed on the November 4, 2008 general election ballot.

Campaign Organization & Funding

Pro-Proposition 8 campaign (“ProtectMarriage.com”):

• Led by religious organizations (particularly the Roman Catholic Church, The Church of Jesus Christ of Latter-day Saints, and evangelical groups)
• Individual Latter-day Saint donors contributed an estimated $20 million — roughly half the Yes on 8 total — after church leaders urged members to support the measure
• Framed as a defense of “traditional marriage” and parental rights
• Early polling showed the amendment trailing; the campaign’s late push and messaging effectiveness swung opinion
• Funding: approximately $39.9 million raised

Anti-Proposition 8 campaign (“Equality California”):

• Led by LGBTQ civil rights organizations
• Actually outraised the Yes campaign, raising approximately $43.3 million (about 52% of the combined total)
• Focused on “No on 8” messaging but struggled against the “protect marriage” framing
• Early polling favored No on 8; the late swing to Yes is generally attributed to the Yes campaign’s more effective advertising — notably ads warning that children would be “taught about gay marriage in school” — rather than any funding disadvantage

Election Results & Demographics

Statewide vote:

• Yes on 8 (ban same-sex marriage): 52.3% (≈7.0 million)
• No on 8 (allow same-sex marriage): 47.7% (≈6.4 million)

Regional & demographic breakdown:

• Support for Prop 8 was highest among:
  • Voters over 65 (61% yes)
  • Republicans and conservatives (76% yes)
  • Evangelical Protestants (81% yes)
  • Voters without college education (58% yes)
  • Rural counties and inland regions
• Opposition was strongest among:
  • Voters 18–29 (61% no)
  • Democrats and progressives (79% no)
  • Non-religious voters and mainline Protestants (70% no)
  • College-educated voters (64% no)
  • Coastal urban areas (San Francisco Bay Area, Los Angeles County, coastal Southern California; 60–70% no)
• Surprise swing: Prop 8 passed despite California voting for Obama (61%) and a Democratic state legislature. African American voters, who overwhelmingly supported Obama, were initially reported by a CNN exit poll to have favored Prop 8 (an early estimate of about 70% yes that was later revised downward to roughly 58% by subsequent analysis); Latino voters split roughly 53% yes, 47% no. The religious-conservative coalition that supported Prop 8 transcended traditional Republican/Democratic lines, including conservative Democrats and religious minorities.

Legal Aftermath & Perry v. Schwarzenegger

Within days of Prop 8’s passage, same-sex couples filed a lawsuit challenging its constitutionality. The case Perry v. Schwarzenegger (later Perry v. Brown after Governor Jerry Brown declined to defend Prop 8) proceeded to federal district court:

• Chief Judge Vaughn Walker (U.S. District Court, Northern District of California) heard the case in 2010, with oral arguments centered on whether Prop 8 violated the due-process and equal-protection clauses of the Fourteenth Amendment.
• August 4, 2010: Judge Walker ruled that Proposition 8 violated the Fourteenth Amendment and was unconstitutional.
• Immediate stay: The decision was stayed pending appeal (Prop 8 remained in effect while litigation continued).
• Ninth Circuit appeal (2011–2012): The Ninth Circuit Court of Appeals upheld Walker’s reasoning but narrowed the ruling to apply only to California, avoiding a broader national precedent.
• Supreme Court and Hollingsworth v. Perry (2013): The U.S. Supreme Court ruled on a technicality (standing) and affirmed the district court’s judgment, invalidating Prop 8.
• Prop 8 officially repealed: June 26, 2013 — California returned to allowing same-sex marriage.

The long litigation and appeal process meant Prop 8 was in effect for approximately five years (November 2008–June 2013). During that period, same-sex couples could not marry, but their pre-Prop 8 marriages remained valid. Approximately 18,000 couples who married before Prop 8 retained their legal status, while others were unable to marry.

Olson & Boies: The Unlikely Legal Partnership

The federal lawsuit against Prop 8 was notable for its lead counsel: Theodore Olson (who had argued for George W. Bush in Bush v. Gore, 2000) and David Boies (who had argued for Al Gore in the same case) — rivals in the most divisive election litigation in modern U.S. history — joined forces to argue that marriage equality was a constitutional right under the federal Fourteenth Amendment. Their partnership was intentionally bipartisan and strategic: Olson’s conservative credentials were meant to insulate the case from dismissal as liberal activism.

Both attorneys argued at trial and on appeal that Prop 8:

• Lacked a rational basis — it could not be shown to harm opposite-sex marriages or advance any legitimate state interest
• Violated due process (the fundamental right to marry, recognized by the Supreme Court in Loving v. Virginia, 1967)
• Violated equal protection by discriminating against same-sex couples based on sexual orientation and sex

The trial record produced by Olson and Boies — including expert testimony on child development, psychological harm, and the history of marriage — became a frequently cited evidentiary foundation for later marriage equality litigation across the country.

Broader Significance & Cultural Impact

Proposition 8 became the focal point of national LGBTQ advocacy and symbolized the regional divide over marriage equality. It accelerated a strategic shift: the defeat of Prop 8 at the ballot box suggested that ballot initiatives (which had been used to pass anti-LGBTQ measures in many states) were no longer effective; federal litigation (Perry v. Schwarzenegger and ultimately Obergefell v. Hodges) became the primary pathway to marriage equality.

Generational change: The strong support for Prop 8 among older voters (65+: 61%) versus opposition among younger voters (18–29: 61% no) reflected a generational sea change. By 2012, national polling showed a majority of Americans supporting marriage equality for the first time.

Religious coalition: The visible role of the LDS Church, Catholic Church, and evangelical organizations in funding and organizing the Yes on 8 campaign provoked backlash against religious institutions and contributed to a broader cultural shift away from anti-LGBTQ religious messaging.

2015 aftermath: When same-sex marriage was legalized nationwide via Obergefell v. Hodges (June 26, 2015), California’s role as the crucible of the Prop 8 litigation contributed significantly to that outcome — the years of courtroom battles and public debate in California helped shift national opinion and provided the legal scaffolding for Obergefell.

Sources

• 2008 California Proposition 8 — Wikipedia
• In re Marriage Cases — Wikipedia
• Hollingsworth v. Perry — Wikipedia
• “More than $83 million spent on Prop 8” — NBC News (Associated Press), February 2, 2009
• “The Money Behind the 2008 Same-Sex Partnership Ballot Measures” — National Institute on Money in State Politics (FollowTheMoney.org)