Shimma, I think you are confusing party affiliation with a real political philosophy, such as paleo-conservatism, for example. For many party affiliation has to do with family, region etc., (and to boot, the two major parties do not differ very significantly) but one's own political philosophy betrays how they fundamentally view the world. This is exemplified in the relationship between neo- liberalism and conflict theory and libertarianism and functionalist theory. It affects too much.
I think our difference is semantic. What you are calling "political philosophy," I am calling "values and principles," and I totally agree about family, region, etc with regard to "politics," which is in many places, essentially a business, and has nothing whatsoever to do with values, principles, or as you call it , "political philosophy."
In terms of relationships, I think it is that view of the world, our ideas about what is right and what is wrong, that are important topics to talk about with someone you think you might be serious about, and I make a distinction between that philosophy, those values, etc, and one's relationship, if any, to the various aspects of the business of politics.
At the same time, I think that we have to acknowledge that not everyone makes that distinction, as I alluded in my previous post. For some people, their philosophy is interwoven with the business of politics, and in some cases, that interweaving may even include some faith-based threads, so to form any sort of opinion in terms of whether a relationship could be impacted, I think both people need to be honest with themselves and with each other on how THEY feel, whether THEY make that distinction, whether THEIR faith traditions and beliefs are linked in their own hearts and minds to one or more aspects of politics the business, which could include a strong belief that politics is not a business!
Once we get into that area of personal beliefs, one thing you can count on - there is someone somewhere who believes absolutely anything you can imagine - and several things that you can't and wouldn't want to!