This is part of a CSPAN's Washington Journal program in 2002 where Andrew Sullivan and Christopher Hitchens were having discussions and taking calls. Same-sex marriage was discussed, and Sullivan fielded some callers (and also Hitchens) inquiring how he could be gay and still consider himself a Christian, while Hitchens talks about why he is an anti-theist. Personally I have plenty of things to disagree with both Hitchens and Sullivan, but both have contributed to certain progressive causes while not being progressives or liberals themselves. In any case, it is interesting to consider if a similar discussion was held today, how different the situation would be.
The full audio of the show is here (in 12 parts). Subjects discussed were American exceptionalism, 9/11 attacks, and same-sex marriage.