Do you *want* to invite her to your parties and get to know her better, or do you just feel that she wants this? Has she asked, outright, why she isn't invited to more things, or closer to you?
If you'd like to pursue a friendship with her or have a close friendship that's being threatened by the political stuff, then it might be a good idea to speak up.
If she's the one who would like to be closer, or invited to more things, then I'd go with blocking the feed and backing away slowly.
Basically, I've found that offering unsolicited criticism to someone, particularly over something that is potentially very emotional and contentious, rarely goes well. She feels attacked for her political views, attacks you in turn, and it goes downhill from there. So I tend not to do it unless I'm in a position where it's my responsibility (mentoring or supervising someone), or if I care enough about them to suffer the potentially nasty consequences of speaking up.
If she's asking why she's not invited, then you are able to give an answer, if you want. "You have some pretty strongly expressed political opinions, and I don't think it would go well at the party."