RealClearPolitics draws the Carter parallel directly: a stagnant economy plus a foreign-policy crisis — Carter had stagflation and Iran; Trump has tariff-driven price hikes and a deteriorating situation in Iran — is the combination that ends presidencies. The argument is that Trump's affordability promises were, structurally, undeliverable, and voters are beginning to register that gap.
The strategic read is simple: Republican incumbents in swing districts who tied themselves to "Day One" cost-of-living relief now own every grocery receipt. That's a midterm environment, not just a presidential approval problem.
The Carter analogy has limits — Trump's coalition is more durable than Carter's was — but the core mechanic holds: when the incumbent has loudly promised affordability and prices stay elevated, the blame attribution is already baked in. Democrats don't need a message. They need a thermometer.