My only thought is that the title is misleading. You mention something about men being more partisan in a given situation, and then only report about supporting abortion.
Still, it's interesting to think about how men might feel when their wives start to make the big bucks. For most of our marriage, my wife made less money than I, but about three years ago my wife started to make about the same as I and it has been that way for about three years. On the one hand I was delighted to see her income improve. Money is a good thing, yes, I'll admit to being venal like that. More money for my wife means more money for my family. Always good. On the other, it did occur to me that her making equal to me made her have more influence and authority, and it made me a little curious.
In the long run, however, or at least over the last three years, it has not changed our dynamic. She still has the same sovereignty over provinces that she commanded before she got the big raise three years ago--e.g., anything concerning the diet, welfare, or health of the boy--and I still have the same sovereignty over provinces that I commanded before she got the big raise--where to live, whether and what car to buy, and the educational plan for the boy. In the end, her going from the lower wage earner to equal wage earner did not significantly affect our roles regarding the nurture of the offspring.
That's not exactly what you're talking about, I understand. You're saying something about the wife making more money, not just making equal money, but I think my comments are relevant still since they describe a situation in which the wife has for a long while contributed less and then evolving into a situation in which she makes the same as the husband, which is sort of like a raise in power status.
Anyway, as far as I can tell, her making equal money as I did not affect either of us in terms of political ideology. She was always more culturally conservative than I, and she was always more economically conservative than I as well. That has not changed. I'm a gambler; she's not. She's not comfortable with change; I am. It's just who we are. This would probably be the case regardless of which of us is earning more.