David Harold McCormick (born August 17, 1965) is an American politician, businessman, and former U.S. Army officer serving as the junior United States senator from Pennsylvania, since 2025.

A member of the Republican Party, he was the chief executive officer (CEO) of Bridgewater Associates, one of the world's largest hedge funds, from 2020 to 2022.

He became its sole CEO in 2020 and stepped down from the position to run for the U.S. Senate in 2022, but lost the Republican primary to Mehmet Oz by 950 votes.

[7][8] His father, James H. McCormick, was president of Bloomsburg University and chancellor for the Pennsylvania State System of Higher Education.

[14] McCormick was part of the first wave of U.S. troops deployed to Iraq during the Gulf War in 1991 and received the Bronze Star for his actions.

[27] In late 2021, while McCormick was mulling a run for a United States Senate seat in Pennsylvania, he began to distance himself from Bridgewater founder Ray Dalio and his defenses of China's human rights policies, openly rebuking him during company calls.

[32] Later he became the Deputy National Security Advisor for International Economic Policy and was George W. Bush's personal representative and negotiator to the Group of 8 (G8) industrialized countries before moving to the Treasury Department in 2007.

[35] McCormick was credited with using his relationships with top executives and policy makers around the world to help coordinate the Treasury Department's response.

[39] McCormick has mainly supported Republicans, but has also donated to Democrats, including congressional candidates Dan Helmer and Amy McGrath and Senator Jack Reed.

[39][43] It was reported in December 2021 that Republicans were recruiting McCormick to run for the Senate seat in Pennsylvania held by Pat Toomey, who did not seek reelection in 2022.

[44] On November 22, 2021, Sean Parnell—who had been endorsed by Trump and was regarded as a front-runner in the Senate race—withdrew from the race amid accusations of domestic violence from his estranged wife.

[46] McCormick's Republican primary opponents criticized him for recently being a resident of Connecticut and for leading a hedge fund that invested in China.

[48] In February 2022, McCormick ran a 30-second commercial during Super Bowl LVI highlighting the rising inflation rate and the withdrawal of troops from Afghanistan against the audio background of crowds chanting "Let's go Brandon", a coded insult to Joe Biden.

The recount did not help McCormick, whose campaign launched a court case to have undated mail-in ballots counted with the rest of the votes.

He said the attack marks "a dark chapter in American history" and "puts a highlight on the responsibility of leaders to be able to create a dialogue where people are understood.

In the past, he has seemed to argue that the benefits of free trade outweighed the downside of displacing American workers and suggested retraining those whose jobs have become obsolete.

[65] In 2009, McCormick and Karan Bhatia co-wrote an opinion piece for Wall Street Journal Asia supporting the Trans-Pacific Partnership.

[32] In 2016 he said, "If we are to promote equality and pluralism around the world, we must walk towards, rather than away from, our unique success in advancing these values at home while still embracing the idea that America is, and always will be, a work in progress".

[43][67] In 2013, McCormick joined 131 other Republicans in signing an amicus brief filed at the United States Supreme Court supporting the legalization of gay marriage prior to Obergefell v.

[68] During McCormick's tenure as CEO of Bridgewater Associates, the company's policy was to fully pay for gender transition surgery.

[69][better source needed] In 2019, McCormick married Dina Powell, an executive at Goldman Sachs who was Deputy National Security Advisor in the first Trump administration.

[74][75] In 2009, McCormick taught at Carnegie Mellon University's Heinz College, on its Washington, D.C. campus; he held the title of Distinguished Service Professor of Information Technology, Public Policy and Management.

[77] McCormick is on the board of both the United Service Organizations (USO)[78][non-primary source needed] and the Hospital for Special Surgery (HSS).