Four out of 10 Americans identify themselves as evangelical, but a much smaller percentage “walk the walk,” according to a newly released Gallup poll on America’s religious trends. The Gallup Organization polled 1,000 U.S. adults in mid-April and found that 42 percent labeled themselves “born-again” or “evangelical.” However, in a survey held one month later on 1,000 Americans, the poll found that only about a quarter of the population hold to “core evangelical doctrines.” Gallup identified three core evangelical beliefs as: believing that the Bible is the actual word of God, engaging in evangelism by encouraging friends and relatives to...