The writer Andrew Sullivan sits across the table from you on Chris Matthews' Hardball praising gay-marriage as a symbol of the homosexual community's desire to join the mainstream. He is a Catholic, conservative in many things, and a highly articulate spokesman for his point-of-view. What do you say? The requisite conservative on pundit panels usually falls back on citing heterosexual marriage's 5,000 year history as society's basic building block. Marriage has always been between a man and a woman. 65% of the American people are against homosexual unions. Etc. That's not going to get it. It's a way of brushing...