Canadian Tigers and the later Lexington class

How would four Canadian Tiger-derived ships affect later Lexington-class battlecruisers and U.S. battleship orders?

Lexington would become a second-generation American battlecruiser, but the United States would not overreact to only four Canadian ships and would discount their effect if maintenance remained weak.

The first U.S. reply would give Lexington a predecessor, making it the second generation of American battlecruiser development. Four Canadian ships would not force a disproportionate American program on their own. U.S. planners would also judge the ships by Canadian readiness and maintenance, not merely by their paper specifications.