STOCKS | Democrats' Congressional Win Prompts Wall Street to Urge Mega-Deals by Mid-2027

The Democrats' sweeping midterm victory is prompting Wall Street and major U.S. companies to reassess plans for large mergers and acquisitions. According to Sina Finance, although U.S. President Donald Trump's administration will retain antitrust approval authority, executives are concerned that the relatively permissive regulatory environment may not last once Democrats take control of both chambers of Congress. Some companies are considering advancing major deals to secure approval before the 2028 presidential election cycle gets fully underway. Wells Fargo banker Fernando Rivas said the market could again adopt a “do it now or lose the chance” mindset for mergers. Paul Nary, an associate professor of management at the University of Pennsylvania's Wharton School, said major transactions take considerable time to negotiate and secure global regulatory approval, so companies should start preparing immediately and aim to announce deals before mid-2027. Large mergers are likely to face greater political scrutiny. More than half of the U.S.-involving mergers valued at least $50 billion announced over the past 20 years were announced during Donald Trump's two presidential terms. This year, Marvell Technology agreed to acquire optical communications company Lumentum for more than $100 billion, while Paramount Skydance agreed to acquire Warner Bros. Discovery for $110 billion. The latter deal received U.S. Justice Department approval without antitrust remedies. Democrats are expected to take control of both chambers in January. Although they cannot directly take over the Justice Department or Federal Trade Commission, they can scrutinize large mergers through hearings, investigations and subpoenas, including deals already approved or completed. Deals drawing lawmakers' attention include DoorDash's $17 billion acquisition of Maplebear, the parent company of Instacart; NextEra Energy's $67 billion acquisition of Dominion Energy; and the completed Paramount-Warner Bros. Discovery merger. Disputes concern competition, consumer prices and corporate responsibility. A potential merger between SpaceX and Tesla, promoted by Elon Musk, could also face scrutiny. Musk had hoped to announce a merger in the first half of 2027. After Democrats won control of Congress, concerns grew that the companies' business and political activities could face closer investigations, weighing on their share prices. Cooling AI investment is adding uncertainty to some large deals. Data center expansion was a prominent issue in several states during the midterm elections, with results reflecting voter dissatisfaction with some related construction. Investors are concerned about the scale of AI infrastructure spending and the risk of tighter restrictions on future data center construction. Marvell and Lumentum shares fell after the election; the strategic value of their all-stock deal relies heavily on continued growth in data center and AI connectivity demand, and the share-price declines and changing industry outlook could add uncertainty about completion. Wall Street investment banks, which had strengthened ties with Republican figures to adapt to the Trump administration's regulatory environment, now need to rebuild communication channels with Democratic lawmakers. Nary said companies will also need strategies for congressional oversight, after merger advisers became increasingly familiar with the Trump administration's approval process.