Even an Iowa could only pause the 1910s naval race

What American ship could stop the naval race if built in the 1910s?

An Iowa might pause the race and knock Germany out, but Britain would build a response rather than concede naval superiority.

An Iowa-sized battleship appearing in the 1910s would dwarf contemporary construction and could interrupt the race. Germany might be forced out, but Britain is expected to respond if the necessary technology exists. The public demand for eight battleships is offered as evidence of the political support behind British construction. Even a ship with 18-inch guns would invite a British answer with comparable armament. The prediction is a pause while rivals adjust, followed by renewed competition.