Mind you, it does work for some people to have different political views and still have a decent relationship. I just think if that's a problem for you, you should address it pretty early on. Just be straightforward and say something like, 'Hey, I hate taxes, love guns, and am a freedom-loving patriot. There are women like Sarah Palin and Lauren Boebert out there, so even if you are a rightwinger there is hope (at least in that regard).
Thinking about it, it's pretty common for right-wingers to hide their power level because they are afraid of even the slightest pushback. When frankly, unless you are a literal fascist, you can do just fine in most situations, jobs, etc.
Considering my political views are somewhere between the Joker and Posadas, I do have to be "somewhat" flexible with the politics of my partner.