Wall Street got a brutal reality check on Thursday, when a big midterm rally flipped into a full-blown rout in a single session. The Dow dropped about 1,220 points, or 2.2%, the S&P 500 slid 3.2%, and the Nasdaq plunged 4.8% into correction territory, meaning it is now more than 10% below its recent peak. The wipeout came just a day after the Dow jumped roughly 1,570 points, its best day since April 2025, as investors first cheered the election results. AI-linked stocks took the worst beating, with Nvidia down 7%, AMD down 12%, and SanDisk down more than 15%. Analysts said traders were suddenly weighing what a newly empowered Democratic Party could mean for the AI data center boom, since many Democrats campaigned against it.

The nerves got worse as Arizona Rep. Yassamin Ansari said on X that a pause on advanced AI development, tougher regulation, and a ban on artificial superintelligence should top the Democratic agenda on day one. She is one lawmaker, not the party's official platform, but her post landed on a market that was already jumpy. Democrats have been building toward this for months, with Sen. Bernie Sanders and Rep. Greg Casar having already unveiled a bill to ban superintelligence and pause advanced AI, and a Data for Progress poll finding 68% of likely voters support the idea. Critics, including some on Wall Street, warn that slowing AI at home could hand an edge to China and push billions in investment overseas. OpenAI moved fast to calm nerves, promising to pay for the electricity and infrastructure at its data centers, so the big question is whether Washington will actually move to slow the AI boom, or whether investors are panicking early.