(CNN Business) – The Trump administration is expected to sue Google on Tuesday, according to two people familiar with the matter, in what is the largest antitrust case against a tech company in more than two decades.
In its complaint, the Justice Department is expected to make sweeping allegations that Google (GOOG) has stifled competition to maintain its powerful position in the marketplace for online search.
Google did not immediately respond to a request for comment.
The landmark federal complaint follows a year-long antitrust probe by DOJ investigators. And it comes on the heels of a major congressional report finding that Google and other tech giants enjoy “monopoly power” and have wielded their dominance in anticompetitive ways. That report alleges that Amazon has mistreated third-party sellers; that Apple’s app store fees and policies are anti-competitive; and that Facebook has sought to eliminate future rivals through targeted acquisitions.
The Justice Department’s expected suit against Google marks the most consequential step the US government has taken to hold Silicon Valley to account after Washington took a dramatic turn against the tech industry following evidence that major social media platforms were manipulated by foreign election meddling efforts in 2016. Since then, the top executives of major tech platforms have been repeatedly hauled before Congress to face questions about their responsibilities toward political speech; hateful content and misinformation; small businesses and local journalism; and competition.
The looming case could pose an unprecedented risk to Google’s wider advertising business, which brought in $134.8 billion in revenue last year, accounting for 84% of Google’s total business.