It's a terrible thing that politics influence this at all. A few months ago I was discussing this with my SO and we came to the conclusion that ~5 years ago neither of us would care about each other's political stances. Today, politics have infiltrated literally every single facet of life and became a mania of sorts for many even non-political types. Ignoring it is difficult to say the least. With that said, political differences, in my humble opinion, is a great thing as long as they're not radical and within normal realms. But, in a polarized climate we live in now radical political views are all the rage and it'd be very hard to dismiss in a relationship.