Well, here is a quote from Goerge Bush's top evangelist.
Billy Graham is (was) probably the most respected evalangest in modern times. He didn't belong to Bush but attended to every US President since Eisenhower.
Graham has preached in person to more people around the world than anyone who has ever lived. As of 1993, more than 2.5 million people had stepped forward at his crusades to "accept Jesus Christ as their personal saviour." As of 2002, Graham's lifetime audience, including radio and television broadcasts, topped two billion.