THE last time the Chair of St. Peter stood vacant, during Pope John Paul II’s funeral in 2005, the Roman Catholic Church enjoyed a wave of unusually favorable coverage from the American press. The Polish pope had a way of disarming even his most stringent critics, and that power extended beyond his death, turning his funeral into a made-for-television spectacle that almost felt like an infomercial for the Catholic faith.

Perhaps not coincidentally, the mid-2000s were the last time the Catholic vision of the good society — more egalitarian than American conservatism and more moralistic than American liberalism — enjoyed real influence in U.S. politics. At the time of John Paul’s death, the Republican Party’s agenda was still stamped by George W. Bush’s “compassionate conservatism,” which offered a right-of-center approach to Catholic ideas about social justice. The Democratic Party, meanwhile, was looking for ways to woo the “values voters” (many of them Catholic) who had just helped Bush win re-election, and prominent Democrats were calling for a friendlier attitude toward religion and a bigger tent on social issues.

That was a long eight years ago. Since then, the sex abuse scandals that shadowed John Paul’s last years have become the defining story of his successor’s papacy, and the unexpected abdication of Benedict XVI has only confirmed the narrative of a church in disarray. His predecessor was buried amid reverent coverage from secular outlets, but the current pope can expect a send-off marked by sourness and shrugs.

The collapse in the church’s reputation has coincided with a substantial loss of Catholic influence in American political debates. Whereas eight years ago, a Catholic view of economics and culture represented a center that both parties hoped to claim, today’s Republicans are more likely to channel Ayn Rand than Thomas Aquinas, and a strident social liberalism holds the whip hand in the Democratic Party.