The Justice Department endorsed a bill Monday forbidding Big Tech platforms such as Apple and Google from self-preferencing, the Biden administration’s first gesture of full-throated support for one of the bipartisan antitrust bills moving through the House and Senate.

The Department of Justice sent a letter to leaders on the Senate Judiciary Committee on both sides of the aisle, expressing support for the American Innovation and Choice Online Act, which would prevent tech giants such as Amazon, Google, and Apple from unduly favoring their own products on their platforms and services or creating cheaper copycats of existing products using internal data.