Trump doesn't know how many submarines US Navy has; Phelan's reply fails to impress POTUS?

Donald Trump used his follow‑on remarks at Mar‑a‑Lago to hype an across‑the‑board naval buildup, claiming the United States is 15–20 years ahead of every rival in submarine technology and calling subs “the most powerful weapon anywhere in the world” and “undetectable.” He said about 15 new submarines are under construction or ready to start, that the U.S. already operates “over 30” boats, and that the Navy will add “12 to 15 brand‑new submarines” on top of three large aircraft carriers now being built, insisting that “nobody can come close,” including China and Russia.