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Read a 2006 interview in which former House speaker Newt Gingrich said that “evolution should be taught as science, and intelligent design should be taught as philosophy.”

Read a May 17, 2011, article published by CBS Minnesota about then-GOP presidential candidate Newt Gingrich’s views on evolution. Gingrich said in May 2011 that he sees no conflict between faith and science with regard to life’s origins.

A September 2011 survey by the Public Religion Research Institute, in partnership with Religion News Service, showed that a majority of Americans (57 percent) believe in evolution. But white evangelicals and Tea Party members — a core constituency for the GOP — are significantly less likely to believe in evolution.

A January 2012 survey of Protestant pastors, conducted by LifeWay Research, shows that by a wide margin most of them believe that God did not use evolution to create humans and think Adam and Eve were literal people. It also found that ministers are almost evenly split on whether the Earth is thousands of years old.

Lee M. Williams is professor of marital and family therapy in the School of Leadership and Education Sciences at the University of San Diego. He is the author of several articles on interchurch couples, including “Premarital Counseling With Interchurch Couples: Clinical Implications From Recent Research,” published in 2002 in the Journal of Couple and Relationship Therapy.

Judith K. Balswick is senior professor of marital and family therapy in the School of Psychology at Fuller Theological Seminary in Pasadena, Calif.

Jack O. Balswick is senior professor of sociology and family development in the School of Psychology at Fuller Theological Seminary in Pasadena, Calif.

Glenn W. Olsen is professor emeritus of history at the University of Utah in Salt Lake City. He is the editor of Christian Marriage: A Historical Study.