Barack Obama cited his youthful experimentation with drugs and John McCain noted his failed first marriage as their greatest moral failings on Saturday at a forum on faith that both U.S. presidential candidates used to appeal to religious voters.

Democrat Obama and Republican McCain met briefly on stage between their respective appearances at the forum hosted by evangelical pastor Rick Warren, an opportunity for both candidates to reach out to religious voters who will be a key voting bloc in the November election.

“I had a difficult youth,” Obama said when Warren asked about his greatest moral failing. “There were times when I experimented with drugs.”

More broadly, Obama said one of the country’s biggest moral failings involved its treatment of the poor.

Answering the same question, McCain said: “My greatest moral failing, and I am a very imperfect person, is the failure of my first marriage.”

As to America’s moral failings, McCain said: “Perhaps we have not devoted ourselves to causes greater than our self-interest, although we’ve been the best at it.”