Big Tech has yet another reason to be worried about the threat of US government regulation.

President Joe Biden announced Tuesday he is nominating Jonathan Kanter, a known legal foe of Google and other major tech companies, to head the Department of Justice’s antitrust division. If confirmed to his post by the Senate, Kanter will have the power to take on cases to break up Big Tech companies or otherwise limit the size of their businesses. And as head of the DOJ antitrust division, Kanter would also decide how to proceed with the Trump administration’s landmark case against Google for engaging in allegedly anti-competitive business practices.

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Other anti-monopoly policy groups like the American Economic Liberties Project put out similarly positive statements.

“President Biden has made an excellent choice to lead the DOJ’s antitrust division,” wrote Sarah Miller, executive director of the American Economic Liberties Project, in a statement to Recode. “Jonathan Kanter has the experience, values, and intellectual foresight to ensure that antitrust enforcement under the Biden administration delivers for working people, small businesses, and communities. … He has crafted many of the most successful legal arguments driving the major antitrust investigations into Big Tech.”