It's happened to John McCain and Barack Obama. Now it's Sarah Palin's turn to go through what one observer has called a "spiritual vetting."
For two decades, Palin was a member of an Assemblies of God church in her hometown of Wasilla, Alaska. In 2002, years before she was elected governor of Alaska, Palin and her family switched to a nondenominational church, but Palin still returns to her old church on special occasions.
There are an estimated 3 million worshippers in the Assemblies of God church in the Unites States, according to the Pew Forum on Religion and Public Life. Worldwide there are 500 million members, which is approximately 25 percent of all Christians. The Assemblies of God church is a form of Pentecostalism, which has become one of the fastest growing Christian movements in the world.
The most scrutinized and least understood aspect of the Assemblies of God Church and Pentecostalism in general is the ancient practice of "speaking in tongues."
More:
http://abcnews.go.com/WN/Vote2008/story?id=5801485&page=1