Google built and maintains its AI leadership from cash, compute, and data accumulated illegally from its monopoly in internet search. Its control over internet search, advertisement, mobile phone operating systems, and cloud computing continues to give it an advantage in AI that its competitors lack. The U.S. Court of Appeals for the District of Columbia Circuit must consider this entrenched and vertically integrated market position when it revisits the lower court’s lax remedies, write Asad Ramzanali and Joel Thayer.