The "ocean railroad story" seems to refer to a specific event or narrative that I am not familiar with It is important to note that my knowledge might be outdated, and I do not have real-time information on events or stories that occurred after that date.
Regarding the idea of subjecting President Biden or any other public figure to a mandatory cognitive test, this is a matter of political debate and opinion. The decision to require cognitive tests for public officials is typically a matter for the relevant authorities and institutions, such as the President's medical team or the relevant constitutional bodies, to consider based on established protocols and laws.
It's worth mentioning that concerns or discussions about the cognitive abilities of public figures are not uncommon, especially among political opponents or the media. However, cognitive testing is a complex issue that requires careful consideration of medical and ethical factors. Ultimately, any decision about cognitive testing should be made through appropriate channels and processes.
As always, political issues should be discussed and debated in a respectful and informed manner, taking into account the viewpoints of various stakeholders and adhering to established democratic principles and institutions.