Steven Hayward wrangles charts and data for Power Line. Here is his latest cross-tabbing marital status and gender with political preference, sourced from the Washington Examiner.
The political differences between married and unmarried men are relatively small, like 6-7%. Those between married and unmarried women are huge, on the order of 25-26%
Comments made here about the mental health of unmarried women - though relevant - would probably be in bad taste.
