What US midterms mean for businesses and markets

The US midterm elections on November 3rd are a consequential event for business, the economy and markets. With all 435 seats in the House of Representatives and 35 of the 100 Senate seats up for election, the outcome will determine whether President Donald Trump enters the final two years of his term with Congress firmly behind him, facing an opposition-controlled chamber, or dealing with a divided government.

The result matters because major economic and business policies, from tariffs and trade restrictions to immigration, environmental rules and foreign policy, have increasingly been driven through executive action. A change in control of either chamber could put greater limits on that approach, increase congressional scrutiny and potentially slow the pace of policy changes.

Why businesses are watching Washington

For corporate America, the biggest implication could be policy uncertainty. Frequent shifts in tariffs, trade rules and regulation can make it harder for companies to decide when to invest, expand capacity or hire. Households can face a similar dilemma, delaying purchases when they are uncertain about the impact of future policies on prices, jobs and incomes.

Trade will be particularly important. Trump’s tariff policies have already forced companies to reassess supply chains, sourcing costs and pricing strategies. A Democratic takeover of one or both chambers could increase pressure on the administration to revisit parts of its trade agenda, although a change in congressional control would not automatically remove the White House’s executive powers.

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Morgan Stanley has highlighted precisely this distinction. The investment bank expects the midterms to alter the policymaking more than the broad direction of the administration’s agenda. Tariffs, trade, deregulation, immigration and export controls are among the areas where the White House retains significant authority, meaning businesses should not assume that a Democratic victory would immediately reverse Trump-era policies.

J.P. Morgan Asset Management, meanwhile, expects the composition of Congress to influence the administration’s ability to pursue additional fiscal policy. A divided Congress could constrain new fiscal measures and produce greater gridlock, while continued Republican control could provide more room for tax cuts, spending initiatives and deregulation.

From Wall Street to state capitals

For investors, however, the midterms may prove less dramatic than the political headlines suggest. J.P. Morgan has noted that markets have historically tended to perform well after midterm elections as political uncertainty clears, with economic growth, corporate earnings, inflation and monetary policy ultimately exerting greater influence on asset prices.

Morgan Stanley has similarly argued that investors should look beyond the election itself and focus on the broader policy and economic environment. In other words, the immediate market reaction could matter less than what the election means for the policy path over the following two years. There is also a second election map that businesses will be watching closely: the states.

State governments have increasingly become a counterweight to Washington, particularly on climate, energy and technology regulation. That dynamic is now spreading to artificial intelligence. With no comprehensive federal AI framework in place, states are moving independently on issues such as deepfakes, AI safety and the enormous energy and infrastructure requirements of data centres.

For companies operating across the US, that could create another layer of complexity, with regulations differing from one state to another.

The midterms, therefore, are not simply about whether Republicans or Democrats control Congress. They could determine how much room the Trump administration has to pursue its economic agenda, how aggressively Congress scrutinises executive action and how predictable the policy environment becomes for businesses.

For corporate America, the biggest question is ultimately one of certainty: will the election produce stronger checks and balances that slow abrupt policy shifts or give the White House another two years of relatively unrestricted policymaking? For companies deciding whether to invest, hire and expand, that answer could be as important as the election result itself.