House Minority Leader Nancy Pelosi has described an upcoming march being organized by gay marriage foe the National Organization for Marriage (NOM) as “venom masquerading as virtue.”

Pelosi, who represents San Francisco, made her comments in joining scores of other California leaders calling on San Francisco Archbishop Salvatore Cordileone to skip the group's second annual March for Marriage. Former presidential candidates Rick Santorum and Mike Huckabee are also expected to speak at Thursday's rally and march to the U.S. Supreme Court.

In 2008, Cordileone played a critical role in getting Proposition 8 on the ballot. The NOM-backed constitutional amendment was a response to a California Supreme Court ruling striking down the state's ban on same-sex marriage. Proposition 8, which re-instituted a marriage ban, was struck down as unconstitutional last year.

According to the San Francisco Chronicle, Pelosi made her appeal in a letter to the archbishop.

“While we may disagree on the subject of marriage equality, we do agree that every person is a child of God, possessed of the spark of divinity and worthy of respect,” wrote Pelosi, one of the country's most powerful Catholics.

The campaign to pressure Cordileone to skip the appearance started last week, when San Francisco Mayor Ed Lee, California Lt. Gov. Gavin Newsom and dozens of other prominent leaders called on Cordileone to forgo the event. An additional 27,000 people, as of Sunday, have signed a Faithful America petition calling on Cordileone to not “speak at hateful anti-gay rally.”

But if his remarks this week are a guide, Cordileone isn't planning to cancel.

While attending the U.S. Conference of Catholic Bishops' (USCCB) summer meeting in New Orleans, Cordileone, who heads the USCCB's Subcommittee for the Promotion and Defense of Marriage, called for an amendment to the U.S. Constitution prohibiting gay couples from marrying.

“An amendment to the U.S. Constitution is the only remedy in law against judicial activism,” he told bishops.