I have two friends who are in the exact same category with your sister. On top of that, they are boomers!
Myself, I voted for GHWB in 92, but when Clinton was elected I told my daughter that I thought we would be ok...after all, we survived Carter. This was in January, before the Inauguration.
It only took about two months before I was muttering at the TV, and by fall of 93 I was in a full-blown rage.