Millions of Americans will head to the polls on Tuesday, November 3, in midterm elections that could determine the balance of power in Washington and shape the final two years of President Donald Trump’s current term.

The elections will decide control of the US Congress, with all 435 seats in the House of Representatives and 35 Senate seats being contested. The outcome could determine whether Republicans retain their narrow majorities or Democrats gain control of one or both chambers.

Unlike presidential elections, midterm elections do not determine who occupies the White House. However, they can significantly change how much power a president has to advance legislation, shape national policy and respond to political challenges.

A difficult battle for control of Congress

Republicans currently hold a narrow 218–214 majority in the House of Representatives, with two vacancies and one independent who caucuses with Republicans.

Democrats need a net gain of four seats to take control of the chamber.

The Senate is also in play. Republicans currently hold a 53–47 majority, meaning Democrats must gain four seats to secure control.

The Senate contest is expected to be particularly competitive, with several races in states including Ohio, Iowa, Alaska and Texas among those that could influence the final result.

According to Reuters, Democrats are widely expected to have a strong opportunity to regain the House, while the Senate battle remains highly competitive.

What would a Democratic victory mean for Trump?

A Democratic victory in either chamber would make it more difficult for the Trump administration to move its legislative agenda through Congress.

If Democrats take control of the House, they would gain substantial authority over congressional investigations, hearings and oversight of the administration.

Potential areas of scrutiny include immigration enforcement, administration ethics and the White House’s handling of the war with Iran.

If Democrats also win the Senate, the political consequences could be even greater, affecting legislation, confirmations and the broader relationship between the White House and Congress.

However, a Republican victory would allow Trump to maintain a more favorable congressional environment during the remaining two years of his term.

The first major nationwide verdict on Trump’s presidency

The election is being closely watched as the first nationwide electoral assessment of Trump’s presidency since his return to the White House.

Voters are facing concerns over the cost of living, the economy, immigration and the US-led war with Iran. These issues could influence turnout and determine which party benefits from public dissatisfaction.

Reuters reported that Democratic voters appeared more enthusiastic about voting in pre-election surveys, although turnout among younger, Black and Hispanic voters remains an important factor to watch.

The election could also influence the political strategies of both parties as they begin looking toward the 2028 presidential race.

Why the results matter beyond Election Day

The balance of power in Congress affects more than party politics. It can influence federal spending, economic legislation, foreign aid, immigration policy and the administration’s ability to implement its priorities.

For international partners and US rivals, the outcome may also provide clues about the political support behind Trump’s foreign policy decisions.

The results will not remove the president from office or automatically end his agenda. But they could significantly change the political environment in which he governs.

Americans vote on November 3. The result could determine who controls Congress — and how much room Donald Trump has to govern during the final two years of his term.

Source: Reuters’ November 2 election-eve analysis and its midterm explainer.