Trains are a romantic thing for a lot of the left. But in much of the US, long-distance rail makes no sense. Air travel is cheaper and far, far more flexible. Building all that rail is fantastically expensive and then you have to maintain it (also expensive). And even after all that, it only goes 1-2 places.
We need more airports and more connections, mostly. And more rail where it has some practical use (which maybe covers 1/20th of the US, but 50% of the population).