Starting Space Force, visiting North Korea to try to normalize relations & trying to buy Greenland are all ego driven, legacy building undertakings IMO. Perhaps Trump wants to build or help build another means to get cargo between the Atlantic & Pacific Oceans? With the water crisis in Panama & in the Canal, it might not be such a bad idea? Below is a plan with many pitfalls some consider? Also, building here on the Mexican Isthmus should help Mexico secure it’s Southern Border. I bet Trump & many immigration/border security advocates would help Mexico build up this corridor if they got some border security assurances in return. Building a wall across the Mexican Isthmus would probably be cheaper than building a wall across the US Southern Border?