Following the blowout midterm victory for Democrats, it’s hard to overstate how much everything will change in the global economy, the geopolitical scene, and the markets. The question is “when?”
That particular question will depend on whether Trump reads the room and goes quietly, or throws a fit and obstructs the many changes that lie ahead. Personally, I expect him to step down at some point, probably very soon, for health reasons. Stepping aside might permit a Nixonesque negotiated avoidance of impeachment – though the disgorgement of ill-gotten gains would be a sticky issue.
It would be wise for the Democrats to avoid pissing off Trump’s considerable base, as their own approval rate is nothing to write home about. And, they have botched plenty of elections over the past few cycles. Perhaps they’ll be satisfied with impeaching Hegseth and a few other cabinet members.
The Iran War
In any case, there are substantial changes afoot following the midterms. Perhaps the biggest potential change is the war on Iran. Though the Democrats have denounced the war, they don’t have the power to end it. The June resolution directing Trump to withdraw is symbolic and doesn’t bind Trump to cease action. They can, however, end any additional funding.
The White House has asked for $88 billion in supplemental funding, which has been stalled and will likely be killed while the war remains unauthorized by Congress. If America’s depleted weapons stockpiles can’t be replenished, things will grind to a halt PDQ. This is the Dems’ strongest lever.
A funding cutoff like in 1973 could easily be passed by Congress, but would only survive a threatened veto if attached to must-pass legislation to avoid a shutdown. And the Pentagon is already the recipient of $840 billion courtesy of the 2026 Defense Appropriations Act and has north of $100 billion already on hand.
One aspect of the market which is already seeing an impact is oil. Iran kept the pressure on, and it showed up at the ballot box. Yesterday’s post-midterm breakdown confirmed their plan.

The AI Industry
Another aspect is the AI trade. Over the past four quarters (Q4 2025 through Q3 2026), the AI and data-center buildout accounted for about 40–50% of US real GDP growth before subtracting imports, and about 20–37% after. The commonly cited middle estimate is about one-third. Its share of the economy’s size is much smaller: about 0.8–2% of nominal GDP, depending on how broadly “AI” is defined. Its share of nominal GDP growth is roughly 15% even before subtracting imports.
Two things to watch next: the Q3 second estimate on Nov 25, since advance estimates of September imports are often revised, and the Q4 capex numbers. The sharp swings between quarters (0.14 pp net in Q4 2025 versus 0.73 pp in Q1 2026) mostly reflect when imports arrive, not changes in the pace of the buildout. Like the war on Iran, however, much will depend on Congress’ success in slowing the pace of growth.
The data centers that feed AI need a lot of energy. Most consumers aren’t anti-AI per se, but higher electricity rates affect Democrats and Republicans alike. Members of Congress surely heard this loud and clear on Tuesday. Can/will they do anything about it? And, if so, will Trump fight them or go along?
The Artificial Intelligence Data Center Moratorium Act introduced in March would block new construction and major upgrades of AI data centers until Congress passes federal AI safeguards. It would also ban US exports of AI computing infrastructure to countries without equivalent safeguards.
With Trump’s support, a moratorium would knock 0.6-1.5 points off real GDP (currently around 2.5%.) If instead he vetoes it, the hit is more like 0.2-0.4 points.
continuing...