Same here. My Sis is a teeth-bared, nostrils-flaring liberal who is (according to my Mom) depressed and angry about the election. Politics aside, Sis is one of the best, smartest, and most caring people I know and I love her dearly, so I haven't called her since the election. She would have done the same for me had it gone the other way.
I'm going to let another week or so pass and give her a chance to "process", then will call to chat, but most definitely NOT discuss the election. If she brings it up, I'm going to invoke the family's "polite society" rule: "Three things are not discussed in polite society: politics, religion, and sexual proclivities."
If your "teeth-bared, nostrils-flaring liberal" sister is one of the smartest people you know, I'm thinking you need to widen your acquaintance.