SPAV is specifically constructed to work with proportional representation. It iterates until all seats are filled.
Yes, that’s how it works. The first round is functionally identical to regular approval which is why I like using the two. Approval for single-winner, SPAV for multi-winner.
But in the US, by Constitutional law, it’s one seat per geographical district.
I’m pretty sure it’s just federal law, but I would have to double check. Not like Congress would change it anyway.
A traditional party primary would have nominated Palin, not Begich, and she would have lost anyways.
That’s pure speculation. But using the voting data from the general, we Begich was preferred to both Palin and Peltola in head-to-head matchups. Palin pulled enough votes from Begich to eliminate him in the first round and he lost to Peltola in the second. If Palin hadn’t run Begich would have won.
You can read more about it from the linked sources here.
Here’s the most relevant section:
Some social choice and election scientists criticized the election in published opinion pieces, saying it had several perceived flaws, which they technically term pathologies. They cited Begich’s elimination as an example of a center squeeze, a scenario in which the candidate closest to the center of public opinion is eliminated due to failing to receive enough first choice votes. More voters ranked Begich above Peltola, but Palin played the role of spoiler by knocking Begich out of contention in the first round of the run-off. Specialists also said the election was notable as a negative vote weight event, as those who voted for Palin first and Begich second instead helped Peltola win by pushing Palin ahead of Begich in the first round.
Elections scientists were careful to note that such flaws (which in technical terms they call pathologies) likely would have occurred under Alaska’s previous primary system as well. In that binary system, winners of each party primary run against each other in the general election. Several suggested alternative systems that could replace either of these systems.
You have to be careful analysing RCV results, because people tend to only look at what the election did, and fail to look at what it didn’t do. One of the good things about RCV is that it collects a fair bit of information, but then it usually ignores a fair bit of it. When trying to understand whether a candidate was a spoiler or not, you have to ask what would have happened if they didn’t run at all, which requires considering collected information the “unaltered” election didn’t take into account. If removing them from the election changes the winner of the race, then they were a spoiler. We know that removing Palin would have resulted in a Begich win over Peltola, so that makes Palin a spoiler. She’s a losing candidate that changed the winner of the race simply by entering, assuming voter preferences are stable.