4th November 2026
The American midterm elections have delivered a major political setback for President Donald Trump, with the Democrats winning control of both the House of Representatives and the Senate.
Although Trump remains President, the political landscape in Washington has changed considerably. For the remaining two years of his presidency, he will face a Congress in which the opposition party has the numbers to block legislation, investigate his administration and make it much harder to implement his domestic programme.
The consequences are already being felt well beyond America. Financial markets have reacted quickly, the dollar has weakened and investors are reassessing what the result could mean for international trade, technology investment, government spending and energy prices.
For Britain, there is an additional concern. Oil is traded internationally in dollars, meaning that movements in the American currency can affect the cost of fuel, diesel and heating oil even when the underlying price of crude changes very little.
Markets react from Asia to Europe
Financial markets began reacting before the final election picture was clear. Asian markets were among the first to respond.
Japan's Nikkei, South Korea's Kospi and Taiwan's technology-heavy share market experienced significant falls during early trading. Technology companies were particularly exposed, with investors concerned that Democratic control of Congress could bring tougher scrutiny of artificial intelligence, major technology businesses and the enormous investment currently going into data centres.
There is also a wider concern about whether the huge sums being invested in AI will eventually produce the returns investors expect.
The reaction was not uniform across Asia. Markets in Hong Kong and mainland China showed different movements, reflecting their own economic circumstances and exposure to international trade.
In Europe, investors were also adjusting their expectations. The euro and sterling strengthened against the dollar, while demand for government bonds increased.
The American dollar index fell to a one-month low, while the yield on ten-year US Treasury bonds declined. These movements suggest that investors were reassessing the outlook for American growth, government spending and interest rates.
The reaction is significant because the United States remains the world's largest financial market and the dollar is the dominant international reserve currency.
Why the Democrats' victory matters
The election result changes the balance of power in Washington.
Democratic control of both chambers means the administration will face much greater scrutiny. Congressional committees can investigate government decisions, demand information and question officials.
The Democrats can also obstruct legislation and make it more difficult for Trump to secure approval for parts of his economic programme.
However, there are limits to what they can achieve.
Trump remains President and retains considerable executive authority. He can veto legislation, and overriding that veto requires a two-thirds majority in both chambers.
Trade policy is another complicated area. The President has significant executive powers over tariffs, although Congress retains important constitutional and legislative responsibilities in international commerce.
Consequently, the election does not mean that Trump's tariffs will automatically disappear or that his international trade policies will suddenly be reversed.
Nevertheless, businesses and investors will now have to consider a different political environment when making decisions about future American investment.
What happens to the dollar?
The dollar's immediate decline is one of the most interesting financial consequences.
On 4 November, the dollar index fell approximately 0.6% to 101.27, while sterling rose to around $1.3458 and the euro strengthened against the American currency.
Investors were responding to expectations that a Democratic-controlled Congress could restrict some of Trump's spending ambitions and increase scrutiny of major industries.
There is also an element of uncertainty about future American economic policy.
A weaker dollar can have several consequences.
For American consumers, imported goods may become more expensive. For American exporters, however, a weaker currency can make their products more competitive overseas.
For Britain, a stronger pound against the dollar can make dollar-priced commodities, including oil, cheaper to purchase in sterling terms.
But currency movements are rarely permanent. American employment figures, inflation, interest-rate decisions and the Federal Reserve's policies will continue to influence the dollar.
The election may have provided the initial shock, but economic fundamentals will eventually become more important.
Oil prices: the election is only part of the story
Oil presents a rather different picture.
Brent crude had been trading around $103 a barrel as investors considered the election results. Prices had already fallen towards a four-week low as markets weighed the possibility of progress in negotiations involving Iran and Ukraine.
However, the situation in the Middle East remains a major source of uncertainty.
The continuing conflict involving Iran, the United States and Israel has disrupted international energy markets. The Strait of Hormuz is particularly important because it normally carries approximately one-fifth of the world's oil supply.
Any further escalation that threatens shipping through this waterway could push oil prices sharply higher.
There are also signs of pressure on available supplies. American crude inventories recently fell by 5.27 million barrels, considerably more than analysts had anticipated. Diesel inventories also declined.
This matters because oil prices are influenced not just by political announcements but by the actual availability of supplies.
A change in the American political balance might encourage renewed diplomatic efforts, but it does not guarantee an agreement with Iran.
If negotiations make progress and shipping routes become more secure, oil prices could fall. If military activity escalates, the opposite could happen.
For the moment, the oil market is balancing the possibility of peace against the continuing risk of supply disruption.
What does this mean for Britain?
Britain is particularly exposed to movements in international energy prices.
Petrol and diesel prices respond to changes in crude oil and refined fuel markets, while heating oil users are directly exposed to the wholesale price of gas oil.
A stronger pound could provide some protection against higher dollar-priced oil. But that benefit could easily be overwhelmed if the underlying oil price rises sharply.
For motorists, hauliers, farmers and businesses dependent on transport, even relatively small changes in diesel prices can have wider consequences.
For households using heating oil, particularly in rural Scotland, the situation is especially important.
Unlike households connected to the gas network, oil-heated homes do not benefit directly from changes in domestic gas tariffs. Their heating costs depend heavily on international oil markets, currency movements and local distribution costs.
There is therefore a distinction between a fall in the dollar and a fall in the price consumers actually pay for fuel.
Even if crude becomes cheaper, it can take time for that reduction to work through the supply chain.
What should investors and consumers watch next?
The election result is an important political development, but the markets will soon turn their attention back to the wider economy.
There are several issues worth watching:
Iran and the Middle East: Any agreement or further military escalation could have a substantial effect on oil prices.
The dollar: Sterling's strength against the dollar could help reduce the cost of imported commodities.
American interest rates: Inflation and employment figures will influence the Federal Reserve's decisions.
Technology investment: Greater scrutiny of AI and data centres could affect American and international technology companies.
Trade policy: Businesses will be watching to see whether Democratic control of Congress changes the direction of American tariff policy.
A political result with global economic consequences
The American midterm elections have demonstrated that even a domestic political contest can have international financial consequences.
The Democrats have gained control of Congress, but they have not taken over the presidency. The resulting political division could create greater scrutiny of government decisions, but it could also produce legislative gridlock.
For financial markets, uncertainty is often as important as the policies themselves.
For Britain, the immediate concern is whether movements in the dollar and international oil prices will translate into lower energy costs or another period of expensive fuel.
There is no guarantee that Trump's electoral defeat will bring cheaper oil. The outcome will depend much more on what happens in the Middle East, whether international shipping can return to normal and how the world's major economies perform.
For households in Caithness and elsewhere in rural Scotland, the American election may seem a long way away. But when the price of heating oil changes, the consequences can arrive much closer to home. And don't forget many Americans heat their homes with heating oil.