our "Closer look" at the political power of evangelicals, they're 15% of the adult population. Yet in 2012, accounted for nearly a quarter of all voters. But, is their outside political influence... See More
our "Closer look" at the political power of evangelicals, they're 15% of the adult population. Yet in 2012, accounted for nearly a quarter of all voters. But, is their outside political influence fading? We'll talk with reverend franklin graham and other leaders. But first, here's Dan Harris. Reporter: One glance at the heavily tattooed pastor Carl Lentz. You will quickly conclude that this place, called hillsong, is not your traditional church. That sounds so fun when you come to our church. We do want to be there. Reporter: Every Sunday in new York City, they preach to 5,000 mostly young worshipers, including occasional celebrities like Justin Bieber. Fashion-forward outfits and heartfelt talk about Jesus. And pop-inflicted gospel music. But, one thing you won't hear much talk of politically divisive issues. I can't say no unequivocally. But, by and large, I don't believe my job as the pastor is to be the chief politician. I think there's room for disagreement in church. Reporter: This is a far cry from the evangelical churches that have I visited. When I interviewed the late pastor in the aftermath of George bush's re-election. What do you say to people in those states who are really worried about the impact that Christian conservatives can have on our government? Repent. Reporter: For decades evangelicals proudly wore their like pat Robertson, who even ran for president. But after two democratic wins, some now suggest that the power of social conservative has faded. Have we seen a decline in the political potency of the religious right? They're still a powerful element in the party. Because they can still determine who wins the nomination. Part of the problem, not in the primaries but in the general election, the country, culturally has moved away from their issues. Reporter: Take gay marriage, where attitudes have changed sub stashlly. 72% of evangelicals over 30 oppose gay marriage. Among evangelicals under 30, that number drops to 49%. Jim Daly, leader of focus on family, has taken note. You can have dialogue with people that you disagree with. I'm doing that now, behind the scenes, I'm talking to people in the gay community, we don't agree on marriage, but there are other things that we can work toward to make culture better. Reporter: Daly took over for founder Dr. James dobson who once said gay marriage would lead to group marriage or incest. From Daly a different view. It's something that we have to relearn. Reporter: Still, he notes a change in tone doesn't mean a change in principles. Which all adds up to a new challenge for a new generation of evangelicals. I think we try to present people with what we believe the truth is and what the gospel is.
This transcript has been automatically generated and may not be 100% accurate.