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Pope: Teachings are nonnegotiable: Benedict holds the line

Pope Benedict XVI has reaffirmed church teachings on divorce and priestly celibacy, and told Catholic politicians they must follow church doctrine on abortion, euthanasia and same-sex marriage.

The pope based his letter to Catholic bishops, released March 13, on discussions held during the 2005 Synod of Bishops that studied the Eucharist in Catholic belief and practice.