What the neutral U.S. Navy could have done about Bismarck

Did the semi-neutral U.S. Navy have a plan to deal with Bismarck if she reached the Atlantic?

Not officially; an improvised response was possible, but most capable U.S. battleships were in the Pacific and few heavy units were available in the Atlantic.

No official U.S. Navy plan is identified for fighting Bismarck while the United States remained formally neutral. An unofficial response might have been assembled if the German battleship entered the wider Atlantic. Most of the strongest American battleships were assigned to the Pacific, however, leaving only one or two plausible heavy units nearby. Political status and force allocation imposed tighter constraints than willingness alone.