I just found this article that I think explains what happened. In a previous RCV election, the Republicans got 60% of the first round vote, but still lost. That was because it was split between more than one Republican as a result of their unusual primary election system that sends the top four candidates to the general election. Basically, they spoiled the election for themselves. The tight result of this referendum is probably more of an indictment of Alaska’s top four primary system than RCV.

I don’t think that makes sense. In both RCV and FPTP, if a candidate gets over 50% in the first round then they’re the winner. In FPTP if no candidate gets over 50% then there’s usually a runoff. I believe that’s why rank choice voting is also known as instant runoff voting.

Why such a close margin? What don’t Alaskans like about RCV?