I have really mixed feelings over this sort of thing.
I can see why people feel like it is odd to hear much about the spouse of a political leader. On the other hand, I do think it's the kind of job where you really have to have both partners in the thing as a team. There are a few jobs that are just like that because they demand so much in terms of flexibility, time, travel, of the one who officially has the job, and then some jobs also really require a social element as well that will usually include the spouse.
Politics, but also the military, people in religious ministry, foreign service, some high end business and even academic positions at times. We've become really uncomfortable with this though as we've come to see the family more atomististically, it seems like we don't know how to talk or relate to these kinds of positions without denigrating the one spouse, usually the wife. She's seen as a sort of hanger-on, or a "Stepford wife" or someone being exploited. My experience has been though when these marriages work it's because both members are committed to that career path and are very hard-working in their own sphere.
I find myself very uncomfortable with the implication that the traditional feminine role in these jobs is not important, contributing to the work, and is embarrassing - so much so that we prefer it when we don't see a man in that role or we like it to be hired out to a nanny/maid etc. I think it also can end up, especially in public service positions, that we don't really offer the right kind of support because we tell ourselves that the spouse ought to be bringing in their own income and their household arrangements are private. And why shouldn't the wives of these people have some kind of recognition for their part of the job? I'm largely considered to be a stay at home mum by some people, and the only part of it I don't like is the assumption by a lot of people that I don't work, I have no brain activity, and my contribution to public life is just to be a sort of leech on society.