Billionaire one-time wealth tax passes in California election 2026?

The available articles provide direct evidence that a qualifying one-time billionaire wealth tax has advanced to the November 2026 ballot. Article AP article explicitly states that California's August 18, 2026 primary election advanced Proposition 40 to the November ballot, and that the measure would impose a one-time 5% tax on billionaires' assets. This matches the resolution criteria of a one-time tax targeting individuals with net worth of at least $1 billion. The fact that it has already passed the primary and is on the November ballot is a strong signal, but the resolution requires that it actually passes in the November 3, 2026 election, not merely that it appears on the ballot. Article NYT article indicates that opponents have raised over $45 million and are running advertising campaigns to defeat it, which introduces meaningful uncertainty about the final vote outcome. There is no article reporting the final election result, so the probability cannot be near 1. Given that the measure has already cleared a significant hurdle (primary certification) and is on the ballot, but faces well-funded opposition, a probability slightly above 0.5 is appropriate. The absence of any polling or final vote data prevents a higher confidence. Article Post article is off-topic and provides no relevant information. Therefore, I estimate a 60% chance the measure passes.