News & analysis
Democrats Win Both Chambers, Putting Data-Centre Rules in Play
A divided government hands Congress subpoena power over contracts and a say in AI infrastructure permitting — while leaving tariff-driven inflation largely beyond its reach.
Key points
- Democrats will control both chambers, opening investigations into government contracts and tighter scrutiny of data-centre development.
- Stricter data-centre rules could slow parts of the AI investment build-out, though Congress has limited direct tools against tariff- and conflict-driven inflation.
- The biggest market variable is how Trump responds: confrontation would raise volatility, cooperation could reduce policy uncertainty.
Democrats have won a majority in both chambers of Congress, a result that raises the prospect of tougher congressional oversight of the Trump administration and puts data-centre regulation, healthcare and government-contract investigations at the centre of the legislative agenda, UniCredit said in an assessment of the outcome.
The most economically consequential item on that agenda is data-centre oversight. Congress does not license individual server farms, but it controls the appropriations, federal permitting and tax treatment that shape where and how quickly large computing campuses get built. Tighter rules around data-centre development, as UniCredit frames the risk, could slow parts of the AI investment boom — the capital spending that has driven demand for chips, power and industrial equipment. That is a slower-growth scenario for the build-out, not a halt: the constraint would come through process and conditions rather than a ban.
The limits of the new majority matter as much as its powers. Congress has less direct scope to address the inflation pressures tied to tariffs and the Iran conflict, according to the assessment, because those levers sit with the executive branch and the Federal Reserve rather than the legislature. Healthcare and investigations into government contracts round out the likely focus areas, giving committees a platform to compel documents and testimony from agencies and contractors.
The result also resets internal party politics ahead of 2028. Republicans are likely to reassess parts of the MAGA agenda, while Democrats weigh how to balance their centrist and liberal wings — a split that will shape which oversight fights actually get pursued and which stall.
For markets, the pivotal unknown is the president's response to the new balance of power. Greater confrontation would tend to increase volatility; cooperation with Congress could reduce some policy uncertainty. That is a conditional read, not a forecast: the direction of the data-centre and contract-oversight agenda depends on whether the White House contests or accommodates it, and the inflation channel Congress cannot touch remains the dominant macro variable either way.
