As a kid, I remember hearing about the Carville-Matalin marriage as a kind of cute "love is more powerful than politics" bit of human interest. As an adult who understands what relationships are, I know you don't stay in a marriage to a person whose values you don't share. Carville is a Republican.
Any time I post about how much I hate James Carville some random person shows up in my replies to tell me James Carville is a good man who is trying to help the party. His wife is a Republican op and all he's done is push the party to the right and you're an idiot if you think that's a coincidence.