Following the US midterm elections, the Democrats are taking control of both the House of Representatives and the Senate. Donald Trump thus loses congressional control over Washington. For the remaining two years of his presidency, the political balance of power is shifting fundamentally. This raises a key question for financial markets: does less political room to maneuver also mean less uncertainty?
In our August article, we highlighted the historical significance of the presidential cycle and the potential consequences of a shift in congressional majorities. What was then a scenario has now become reality. The outcome, however, is more decisive than expected: the Democrats will control both chambers of Congress.
The political shift in power is substantial. Its economic and financial consequences, however, call for a nuanced assessment. In this article, we look at what this Democratic victory could mean for Trump, the US economy, and financial markets.
Washington Faces Economic Policy Gridlock
With a Democratic majority in Congress, it will become significantly more difficult for the administration to push through new economic policy initiatives. Further tax cuts, additional fiscal stimulus, or sweeping deregulation initiatives are likely to meet considerable resistance. At the same time, implementing existing plans will not be free of political pushback either.
For the US economy, this initially means less room for additional government stimulus. This could limit the course of fiscal expansion and reduce the federal government's borrowing needs, at least compared with a scenario of continued Republican control.
However, this should not be taken to mean a lasting improvement in US public finances. The structural budget deficit, the rising interest burden, and high refinancing needs remain. In addition, the Democrats could try to reverse certain spending cuts, particularly in health care and social programs. Negotiations over the federal budget and the debt ceiling are also likely to become more contentious in 2027. While political gridlock may make further fiscal expansion more difficult, it by no means guarantees fiscal consolidation.
Regulation is another area to watch. Technology companies, the AI industry, and cryptocurrencies in particular could come under closer congressional scrutiny. As data centers are built out, issues such as energy supply, infrastructure costs, environmental requirements, and local permitting processes are likely to gain importance. The political environment could shift especially in states such as Texas and Virginia, which are key to the build-out of AI infrastructure.
As things stand, however, what is expected is not a fundamental halt to the AI investment cycle but rather a build-out subject to more conditions. Many investments have already been approved or are under way. Additional requirements could, however, delay projects, make them more expensive, or shift them to other regions.
What Does This Mean for Financial Markets?
The initial market reaction was pronounced: technology stocks, and AI-related names in particular, came under pressure. At the same time, US Treasury yields fell, while the US dollar weakened against major currencies as US interest rates declined. The initial equity market losses were, however, largely recovered over the course of trading. The reaction shows that investors initially priced in above all the potential regulatory consequences and lower fiscal expansion.
For technology companies, this adds a further source of political uncertainty. Tighter oversight of the AI industry and possible restrictions on data center expansion could weigh on investment momentum. At the same time, the build-out of AI infrastructure has contributed significantly to investment growth and economic momentum in the US in recent years. A slowdown in this investment cycle would therefore affect not only individual technology companies but could also influence overall economic growth. Companies whose growth expectations depend heavily on the continuation of the current AI investment cycle would be hit hardest.
At the same time, it should be borne in mind that political reservations about data centers are not driven purely by party politics. Debates about electricity prices, grid infrastructure, and resource consumption are also intensifying in Republican-governed states. Developments are therefore likely to depend more on local conditions than on any single majority decision in Washington.
US Treasuries could benefit from the new political constellation in the short term. If additional tax cuts and fiscal stimulus become harder to push through, this could lower expectations of the federal government's future borrowing needs. The initial market reactions already reflected this reasoning. However, the structural challenges of US fiscal policy remain. The change in majorities will not automatically put the debt on a sustainably stable footing. In addition, political conflicts over the budget and the debt ceiling could at times trigger additional volatility.
Lower US yields initially weighed on the US dollar. At the same time, growing political and geopolitical uncertainty could support demand for safe-haven assets such as gold and the Swiss franc. However, interest rate differentials, relative growth trends, and Federal Reserve monetary policy remain the decisive drivers of currency movements.
Overall, the immediate market reaction is understandable. It should not, however, be equated with a fundamental change in the investment outlook. Economic growth, corporate earnings, inflation, AI investment, and interest rates remain more important for the medium-term development of financial markets than the political balance of power alone.
The Third Year of the Presidency: Historical Tailwind, but No Guarantee
One aspect of our August article deserves another look: the historical presidential cycle.
2026 is the second year of the current presidency and thus the classic midterm election year. Historically, these years have often been marked by elevated volatility and comparatively weaker stock market performance. By contrast, the third year of a presidency, in this case 2027, has statistically been one of the strongest phases of the four-year cycle. In particular, the twelve months following the midterm elections have historically often seen positive stock market performance.
One possible explanation is that political and economic policy uncertainty tends to decline after the elections. The balance of power is settled, and investors refocus more on economic fundamentals. Historically, political uncertainty has often reached a low point in the third year of a presidency.
These observations generally point to a more constructive market environment in 2027. However, they should be understood neither as a forecast nor as a guarantee of positive stock market performance. Valuations, corporate earnings, inflation, monetary policy, and geopolitical developments can override the historical effect at any time.
Trump Remains Able to Act, but Geopolitical Uncertainty Lingers
Losing his congressional majority by no means forces Trump to abandon his economic and geopolitical agenda. The president still has considerable executive powers. In trade and foreign policy in particular, the administration can act within existing legal frameworks without new congressional approval.
This applies above all to tariff policy. Although it will become harder to pass sweeping new economic legislation, the administration can still draw on various legal instruments to impose or adjust tariffs. In foreign policy, too, the president retains considerable room to maneuver.
This is precisely where a key source of uncertainty lies for the next two years. Trump's weakened position at home need not automatically lead to a more restrained foreign policy. Trump could seek political wins through foreign policy initiatives and international agreements.
The conflict with Iran and further developments in the Middle East remain particularly relevant in this regard. A renewed escalation would have an immediate impact on energy prices, inflation expectations, and investors' risk appetite. Relations with China and transatlantic relations also remain key factors for global trade and supply chains.
How Trump uses his remaining options could therefore become at least as important for financial markets as the new balance of power in Congress. Less room to maneuver at home does not necessarily mean less political or geopolitical uncertainty.
What Does This Mean for Trump?
Beyond the economic consequences, the election result also significantly changes the president's domestic political position. With control of both chambers, the Democrats gain far-reaching powers of congressional oversight over the administration. Committee chairmanships, investigations, and subpoenas are likely to play a greater role going forward.
Possible impeachment proceedings could also return to the political agenda. Actual removal from office, however, would require a two-thirds majority in the Senate. That political hurdle remains high. A more likely outcome is therefore a period of intense congressional confrontation that could further constrain the administration's ability to act.
At the same time, the midterms already mark the start of political preparations for the 2028 presidential election. Within the Republican Party, questions of political succession and future direction are likely to gain importance.
For financial markets, whether impeachment proceedings actually take place matters less. What matters more is whether growing political confrontation undermines the predictability of economic policy and creates new uncertainty for companies and investors.
What Does This Mean for Investors?
The Democratic victory changes the political risk profile of the US. It limits Trump's room to maneuver at home, makes additional fiscal stimulus more difficult, and increases regulatory pressure on certain sectors of the economy. At the same time, his executive powers, and with them trade policy and geopolitical uncertainty, remain largely intact.
For investors, this does not send a clear signal in favor of any particular asset class. The historical presidential cycle does point to a generally more constructive environment next year. Whether this pattern repeats in 2027, however, will depend less on the balance of power in Congress than on how economic growth, inflation, corporate earnings, and monetary policy develop.
The midterms change the political rules of the game, but not the fundamental valuation mechanisms of financial markets. What matters, therefore, is to put political developments in the right context without drawing hasty investment conclusions from them.
The Fundamental Environment Remains Decisive
Despite the political shifts, the fundamental environment for financial markets remains broadly solid. US economic momentum, corporate earnings, and investment in artificial intelligence continue to provide important support. The midterms change the political environment but do not automatically call the underlying growth drivers into question. For investors, it therefore remains crucial to assess political developments in the context of economic fundamentals.
A more detailed assessment of our current capital market and investment outlook can be found in our Investment Guide November 2026.
