We need trains in general. Long distance too. It's absurd that you need to go by plane or car to travel long distances in a supposedly wealthy and developed country.
The really obvious ones are a Cleveland-Columbus-Cincinnati rail in Ohio (hey #populist
Ohio Dems, want an unorthodox platform to appeal to Obama-Trump voters who feel "left behind" and "disconnected?") and a Cheyenne-to-Pueblo rail in Wyoming and Colorado (seriously, why has this not been done already? Utah did it for their urban corridor and it's great)