A new Michigan poll from the Public Sentiment Institute (TPSI) shows former U.S. Secretary of Transportation Pete Buttigieg leading a hypothetical 2028 Democratic primary in the state with 24.2% — but almost as many likely Democratic voters, 21.7%, say they are undecided. TPSI released full toplines and methodology for the July fieldwork, and the polling snapshot is as useful as a weather forecast three months out: interesting, but not earth‑shattering.
Poll details and why the undecided is the real story
The TPSI Michigan poll was conducted July 25–29 with 762 likely Democratic primary voters and a reported margin of error of about ±4.0 points. TPSI itself flagged the big undecided number as “the real finding,” warning reporters against shoving those voters onto a candidate list just to make neat percentages. Translation: you can put Buttigieg’s name on top of the chart, but a fifth of the electorate saying “I don’t know” makes any early frontrunner claim shaky at best.
Buttigieg’s lead: local strength or national trend?
Buttigieg at 24.2% in Michigan lines up with other early reads that put him in the high teens nationally, but this isn’t a coronation. He’s a well‑known figure, but still a former Cabinet secretary without a broad populist base. Other names in the TPSI topline — U.S. Senator Jon Ossoff, Representative Alexandria Ocasio‑Cortez, Governor Gavin Newsom — split the field and leave a lot of room for movement. And yes, former Vice President Kamala Harris checks in at a meager 5.1% in this test, which should make Democrats nervous about the “default” rematch theory.
Pro‑Israel PAC money: a surprising liability for Democrats
TPSI also asked whether accepting contributions from a pro‑Israel PAC would affect support for a U.S. Senate candidate. Forty‑one percent said “much less likely” and another 14.8% “somewhat less likely,” producing a roughly 56% to 7.5% net negative for pro‑Israel PAC money among Michigan Democratic primary voters. That’s not just a quirk — it’s an intensity signal that could reshape fundraising and messaging. Democrats who count on steady donor cash from pro‑Israel groups may be in for a rude surprise when primary voters react differently than expected.
Bottom line: noise, opportunity, and a big undecided question
This TPSI Michigan poll is a useful early signal — Buttigieg is in play, and the pro‑Israel PAC result is a warning flag — but it is far from decisive. With a large undecided bloc and a modest sample, the numbers can shift fast. For Republicans, the takeaway is simple: enjoy the Democrats’ messy tea leaves, but don’t get cocky. For Democrats, the message is clearer: talent alone won’t win a primary if most voters haven’t picked a lane and big chunks of the base are hostile to traditional donor sources. Watch the undecideds; they will decide whether any early “lead” means anything at all.
