D.U.I.

Vehemently anti-gay, soon to be appointed Archbishop of San Francisco, one of the most gay cities in the world has made a booboo.

The Roman Catholic archbishop-elect of San Francisco was arrested for investigation of driving under the influence, San Diego police said Monday.

The Rev. Salvatore Cordileone, a vigorous supporter of California’s same-sex marriage ban, was taken into custody after being stopped early Saturday at a checkpoint near the San Diego State University campus, said Detective Gary Hassen, a police spokesman. He declined to comment on whether Cordileone took a sobriety test.

Cordileone, 56, is a native of San Diego, where he was raised and ordained as a priest in 1982. In July, Pope Benedict XVI selected him to replace Archbishop George Niederauer, who is retiring in October. Cordileone was most recently bishop of Oakland and several years ago, he was an auxiliary bishop in San Diego.

While serving in San Diego four years ago, Cordileone was instrumental in devising an initiative to strip same-sex couples of the right to wed in California and then raising Catholic dollars to qualify it for the ballot. He also was part of a statewide network of clergy that promoted the measure, known as Proposition 8. Campaign finance records show he personally gave at least $6,000 to back the voter-approved ban.

Since last year, Cordileone has been chairman of the U.S. Conference of Catholic Bishops’ Subcommittee for the Promotion and Defense of Marriage.