Stocks soar after the Democratic "blue wave" in the midterms, but AI data centers come under scrutiny

Wall Street rallied strongly on Wednesday, November 4, 2026, after Democrats won decisive victories in key midterm races. According to NBC News, the outcome immediately made clear which party would control the House of Representatives and the Senate. That marked a change from previous years, when decisive projections took several days.

The Nasdaq Composite closed up 1.4%. The S&P 500 gained 1.58%, its best day since August. The Russell 2000, which tracks small and mid-sized companies, rose 1.5%. The Dow Jones gained 1,569 points, its best session since April 2025. Oil, which had risen sharply this year due to the war with Iran, fell more than 9%.

The day had begun very differently. When the first results came in on Tuesday night, Nasdaq 100 futures fell as much as 2.5%. Over the course of Wednesday, the picture turned around.

Analysts cited in the article attribute the rally mainly to reduced political uncertainty. Deutsche Bank's George Saravelos noted that a broad Democratic majority in Congress, together with President Trump's statement that he is willing to work with the opposition, "should act as a brake on extreme policy outcomes" and reduce risk premiums. He added that the market will tend to view surprise policy shifts by the administration as time-limited by the next presidential election or by the new domestic political configuration. Truist's Keith Lerner noted that since 1946, stocks have been higher one year after every midterm election. He also said that getting past the uncertainty of these elections usually triggers a relief rally.

Goldman Sachs economists expect Democrats to use fiscal deadlines to try to limit the war with Iran, roll back some tariffs and undo the spending cuts approved last year.

The key caveat for the AI sector is the risk to the data center boom. Morgan Stanley speaks of "incrementally negative" sentiment toward AI, on expectations of greater restrictions on data centers. Goldman Sachs believes that, at the federal level, the regulatory landscape for AI and data centers is unlikely to change, since it would require bipartisan support. However, it believes Democratic wins at the state and local level will likely bring short-term moratoriums on data centers. These could affect about 45% of the planned capacity expansion in the US.

Several Democrats who won key governorships have called for pausing data center construction in their states. The article cites Keisha Lance Bottoms in Georgia and Amy Acton in Ohio. In Texas, Democrat Gina Hinojosa defeated Republican Governor Greg Abbott. Texas is, arguably more than any other state, a focal point for AI investors and a critical market for data centers. Wolfe Research's Tobin Marcus described it as the only state with enough scale for a slowdown to have an impact.

Evercore's Sarah Bianchi wrote that Democratic wins in Texas, Ohio and Georgia, which account for a large share of the country's project pipeline, mean new pauses and restrictions. She expects 2027 to be a turbulent year for developers. She also urged investors to be cautious: the effect of any pause or moratorium will depend on the details, such as exemption clauses for projects already underway and the possibility that affected projects move to other states. According to the article, Democrats were also projected to win Senate seats in states where data centers were a campaign issue, including Georgia, North Carolina, Michigan, Ohio, Iowa and Kansas.

The split of winners and losers on the stock market was uneven. SpaceX and Tesla, both active in AI and data centers, fell more than 3%. They are run by Elon Musk, who spent hundreds of millions of dollars backing Republican candidates and would have been one of the big beneficiaries of a Republican victory. Musk wrote on X that data centers in space "look pretty attractive right now". He has proposed putting servers for AI systems in orbit, an idea that most experts say faces significant obstacles.

By contrast, Amazon, Microsoft and Alphabet (Google's parent company) rose 6%. Investors believe that, if data center construction slowed, these cloud providers would be best positioned because they already have sufficient capacity. Apple also rose 6% to an all-time high.

Another risk flagged by JPMorgan Chase is "investigation risk" for executives with close ties to Trump. Companies such as Nvidia, Apple and Comcast, parent of NBC News, have donated millions to the president's projects, particularly his ballroom. Leading Democrats have indicated they want to open investigations into some of those projects in January, when their new majority gives them subpoena power. Trump Media & Technology Group, owner of Truth Social, plunged 25% to an all-time low.

The article highlights the weight of tech in the market. Amazon, Nvidia, Microsoft and Alphabet, along with some data center startups, have invested hundreds of billions of dollars in AI models, data centers and equipment. The Nasdaq 100 is up 40% since Election Day 2024, compared with roughly 30% for the S&P 500. Any widespread halt to construction would put those investments at risk.

Markets had already been nervous for months over whether the massive investment in AI will pay off. The previous Friday, the S&P 500 and the Nasdaq had their worst days since mid-June, after Intel and Amazon, two key suppliers to AI companies, reported mixed results.