Democrats win both chambers of Congress: what the 2026 midterm result changes

The Mississippi Senate race was the closest. CNBC reported Democrat Scott Colom leading Senator Cindy Hyde-Smith by 65 votes with about 95% counted, with the outcome possibly hinging on mail ballots arriving after Election Day, which the Supreme Court allowed to count. In Alaska, Democrat Mary Peltola and Republican Senator Dan Sullivan appeared neck and neck. Treat the Senate total as provisional until those are called.

In an interview with CNBC, President Trump said he can work with Democrats on “many more things than people understand”, mainly financial issues, and ruled out cooperation on an open border and on transgender athletes. He said he would veto Democratic bills he considers “insane”, and that after a few months of vetoes Democrats would come back to negotiate. He signalled no tariff rollback, arguing that removing them would halt construction at about 3,000 plants. He also agreed with Vice President JD Vance that the Iran war contributed to the losses, then said it was oil prices: “Not the war, the price.”

• Investigate. Democrats gain subpoena power. House Oversight's incoming chair Robert Garcia named the Trump family, immigration enforcement, corporate corruption and Jeffrey Epstein as priorities, per CNBC.
• Choose leaders. Hakeem Jeffries formally launched his bid for House speaker, with a vote when the new Congress convenes on 3 January.
• Shape the money bills. Senator Ron Wyden, expected to chair the Senate Finance Committee, outlined plans focused on billionaire taxes, healthcare, tariffs and CEO accountability, per CNBC.
• Fight over the debt ceiling. CNBC reports it is expected to become contentious, and that analysts warn it could add volatility to the bond market.

Divided government means a bill needs both chambers and the President's signature, or a two-thirds majority to override a veto. CNBC quotes policy experts saying household costs such as health insurance premiums, taxes, housing and student loans could be affected, but that changes would take time given Trump's veto power. Goldman Sachs, per Fortune, goes further: it expects new tariff increases after the election that would more than offset any Democratic rollbacks, raising the effective tariff rate by a little under 2 percentage points, and sees a national data-center moratorium as unlikely. Those are forecasts, and the direction of tariff policy is the subject of part 5.

New members are not seated until the Congress convenes on 3 January, so the current Congress remains in place for the weeks between.

• The final Senate margin, once Alaska and Mississippi are called.
• Whether Democrats unify behind a single AI and data-center policy; there is a range of views from a moratorium to targeted limits.
• Whether the President and a Democratic Congress find compromise on spending, as he has suggested, or settle into veto standoffs.

This is one of eleven connected pieces on the November 2026 election and market shock. Read them in order, or jump to the one you need.

1. 01The crash: what happened on 5 November
2. 02How $2.7 trillion was wiped out in a day, and whether that number is real
3. 03From rally to rout: why stocks rose on the Democratic win and crashed a day later
4. 04The Democratic win: what the midterm result changes (this article)
5. 05What a Democratic Congress means for the world economy
6. 06The data-center backlash and what it means for AI
7. 07Is it really an AI bubble? The evidence on both sides
8. 08Gold after the midterms
9. 09Bitcoin and crypto after the midterms and the chip crash
10. 10What happens next: the dates, scenarios and signals to watch
11. 11The discussion: the hardest questions about the crash and the AI bubble, answered

• 2026 midterm election results: House, Senate — CNBC
• BofA warns of AI correction risk as data-center backlash hits the 2026 midterms — Fortune
• 2026 House midterm election results as Democrats capture majority — CBS News