Congress is looking into big tech’s market dominance with an antitrust probe launched by the House Judiciary Committee on Monday.

The Subcommittee on Antitrust, Commercial and Administrative Law, chaired by Rep. David Cicilline, D-Rhode Island, will conduct a “top-to-bottom review” of a small group of dominant tech platforms that could have the “incentive and ability to harm the competitive process.” The bipartisan investigation will include a series of hearings held by the subcommittee and requests for relevant information.