Will Marjorie Taylor Greene be the 2028 Republican presidential nominee?

Step 1: Base Rate Analysis

Historical base rate for candidates who:

• Resigned from elected office
• Had public feud with party kingmaker
• Explicitly denied running for president
• Lost party endorsement

This base rate is extraordinarily low, estimated at <1%. In modern GOP politics (post-2016), Trump's endorsement is essentially determinative. Candidates who Trump has labeled as "traitors" have zero pathway to nomination.

Step 2: Current Market Assessment

Market odds of 1.25% (0.0125) already price MTG as an extreme long-shot. This is appropriate given:

• She's not even registering in top-tier polling
• Frontrunner JD Vance has 39-52% in polls, 34-39% in prediction markets
• Marco Rubio second at 20-25%
• MTG doesn't appear in lists of viable candidates

Step 3: Specific Evidence Adjustments

Negative factors (reducing probability):

1. Trump feud is fresh and severe (November 2025) - Trump called her a "traitor" publicly, this is only ~6 months old
2. Recent proxy evidence - MTG ally Thomas Massie lost primary to Trump-backed candidate just 7 days ago (May 19, 2026), confirming Trump's continued control
3. Explicit public denial - "I'm not running for President" stated ~6 months ago
4. No campaign infrastructure - Resigned from Congress in January 2026, no signs of organizing
5. Recent focus on conspiracy theories - May 21 interview (5 days ago) showed her discussing election cancellation theories, not building candidacy
6. No grassroots momentum - Would typically see fundraising, PAC formation, Iowa/NH visits

Positive factors (slightly increasing probability):

1. Politicians reverse denials - Historical precedent exists (though rare)
2. Time horizon - 2.5 years until nomination, events could shift dramatically
3. Populist brand - MTG has name recognition and populist following
4. Black swan potential - Multiple frontrunners could collapse simultaneously

Step 4: Adjustment from Base Rate

Base rate: <1% (0.01)

• Trump's control in GOP primaries: -0.003 (recent Massie loss confirms this)
• Recent explicit denial + resignation: -0.002
• Time for reconciliation/reversal: +0.003
• Black swan multiple-collapse scenario: +0.002

Estimated probability: 0.8% (0.008)

This is lower than the current market odds of 1.25%, suggesting the market may be slightly overpricing MTG's chances (or pricing in entertainment/meme value).

Step 5: Scenario Analysis

The scenarios detail how this could resolve, with the bear case (no nomination) at 96% being most likely.

SLIGHT EDGE ON 'NO': My estimated probability of 0.8% is lower than the market's implied 1.25%, suggesting the market is overpricing MTG's chances by ~56%. However, the edge is marginal (difference of only 0.45 percentage points).

This is a very low-liquidity bet where the market may be pricing in:

1. Entertainment/meme value (people betting on MTG for fun)
2. Lottery ticket appeal (high payout for small bet)
3. Insider uncertainty about her true intentions

The market appears slightly inefficient at this extreme tail, but the edge is not substantial enough to warrant strong conviction. At these probability levels (<2%), even small amounts of new information could swing estimates significantly.

Recommendation: Market is approximately fairly priced, though slightly generous to 'Yes'. Any edge on 'No' is eaten by opportunity cost and time value of capital given 2.5-year resolution timeline. Would need odds below 0.5% to have strong 'No' conviction, or above 3% to consider 'Yes' value.