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Iowa ballot measures 2026, explained

1 statewide measure on Tuesday, November 3, 2026. Each one in plain words: what it does, what a yes and a no vote mean, and the best case on both sides. No recommendations.

Researched separately by
ChatGPTClaudeGeminiGrok
then checked against each other: strong agreement (88/100). See where they split. Updated November 3.

Your Iowa ballot, in order. Tap a measure for the full explainer.

  1. Amendment 1Constitutional amendment

    Two-Thirds Vote for Income Taxes

    Lawmakers can now raise state income taxes with a little more than half the votes. This would require about two out of every three lawmakers in both chambers, like needing most of a class to agree before changing a rule.

    Yes vote
    The Iowa Constitution would require two-thirds of both the House and Senate to raise individual or corporate income tax rates or create certain new state income-based taxes.
    No vote
    The current rule remains, allowing a simple majority in both chambers to raise or create those state income taxes.
    Case for and against, money, sources

How sure is this guide?

Where the four AIs disagreed

ChatGPT, Claude, Gemini and Grok each researched Iowa's ballot on their own, with web search. The score is how closely their answers matched. Where they split, check the official voter guide before you trust either side.

88/ 100Strong agreement

  • Which taxes are covered

    • GPT-5.6 Terra: Also covers specified income-based taxes and excludes local-option taxes.
    • Claude Sonnet 5.5: Covers state income taxes, not sales or property taxes.
    • Gemini 3.8 Flash: Describes individual and corporate rates and new income taxes.
    • Grok 4.5: Includes new state income-based taxes alongside individual and corporate rates.

Before you vote

This guide was written by AI models with web search and does not tell you how to vote. Details can be wrong: your sample ballot and Iowa's official voter guide are the final word.

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