It’s that bill, the Ending Platform Monopolies Act, that antitrust crusaders see as the linchpin of the package. Sponsored by Rep. Pramila Jayapal (D-Wash.), the measure would make it illegal for the largest Internet firms to compete on their own dominant platforms — as when Apple sells apps on the App Store, or Amazon sells goods on its e-commerce site — if that competition is deemed to create a conflict of interest. Rep. Matt Gaetz (R-Fla.), one of two Republicans who joined Democrats in supporting it, called it “the big enchilada” of Big Tech reform. As of Friday, its future was looking bleak, supporters acknowledged, even as other elements of the package appeared to have the momentum needed to move forward.