House GOP Task Force Targets McKinsey Over 'Plainly Illegal' DEI Practices

The House Oversight Committee's task force on constitutional rights is taking aim at one of the world's most influential consulting firms, accusing McKinsey & Company of helping embed race- and sex-based hiring policies across corporate America that run afoul of the Civil Rights Act of 1964.

Rep. Brandon Gill, R-Texas, who chairs the Task Force on Defending Constitutional Rights and Exposing Institutional Abuses, sent a letter Monday demanding answers about McKinsey's diversity, equity, and inclusion (DEI) research, which he says was "highly influential in American corporations." The probe is the latest GOP push against DEI programs that critics say have quietly turned into illegal discrimination.

McKinsey Reports Cited as Cover for Discriminatory Hiring

The letter points to four reports McKinsey published between 2015 and 2023 arguing that companies with greater racial and gender diversity financially outperformed their rivals. Gill says those findings were cited by publicly traded companies, asset managers, proxy advisory firms, and banking institutions as justification for embedding racial and sex-based targets into hiring, promotion, executive compensation, and proxy voting policies.

"With the support of the previous administration, progressive activists cited McKinsey's reports to push companies, governments, and stock exchanges to implement rules which forced or incentivized illegal corporate racial or gender-based hiring and disclosure policies," Gill wrote.

"Racial discrimination in the employment context, including under the guise of DEI, has been pervasive despite being plainly illegal for over half a century."

Questions Over the Research Behind the DEI Push

The task force is also challenging the credibility of McKinsey's research itself. Although McKinsey said in 2024 that it "stands by its findings," Gill noted that other researchers have found zero statistical correlation between a company's racial and gender diversity and its financial performance.

"Researchers assessing the McKinsey DEI studies cannot recreate the results and also find that McKinsey likely swapped the cause and effect of its DEI conclusions," the letter said. In other words, the firm may have confused companies that performed well because they were well run with companies that performed well because of diversity quotas.

The stakes are significant for a firm that advises a large share of the Fortune 500. If McKinsey's research helped drive hiring and compensation policies across that network, the task force wants to know how deep the influence ran and whether the firm's own clients acted on findings that researchers say cannot be reproduced.

The Cost of the DEI Experiment

The probe lands as the Trump administration has quantified how expensive the DEI experiment has been. Gill cited a 2026 White House Economic Report finding that DEI initiatives cost the U.S. economy roughly $94 billion in 2023 alone.

The administration has already moved to strip DEI requirements from federal contracts, and the task force's scrutiny of McKinsey signals the fight is expanding into the private-sector consulting ecosystem that helped spread those policies through the economy. Courts have also been pushing back, with federal judges blocking DEI mandates in federal grants and the Supreme Court's earlier rulings on race-conscious practices reshaping the legal landscape.

What Happens Next

The letter sets the stage for a formal document demand and possible testimony from McKinsey executives. The task force is expected to seek internal communications and the underlying data behind the firm's diversity studies, including how the reports were marketed to corporate clients.

For companies still running race- and gender-based hiring programs, the probe is another warning that the legal ground they once stood on has shifted. For McKinsey, the fight is a test of whether the consulting giant can defend research that helped reshape corporate hiring for a decade.