TVA delivers among the least expensive power in the country. This is largely due to substantial nuclear and hydro, albeit with coal and gas-peakers to fill in gaps.

We also have a huge pump-storage facility, and are (foolishly, IMHO) pursuing a second pump facility in Alabama (instead, we should pursue battery electric storage at sub-stations). The currect structure can sink an entire nuclear facility (or deliver, relatively instantaneously by grid standards).

µicronuclear is the next big buzzword in TVA – which I think is smart but question-inducing (e.g. consider the multi-billion dollar Bellafonte facility, which has never generated a single kWH – and has largely been scrapped to lowest-bidding salvagers). I love nuclear energy, but TVA doesn't have the best track-record (despite substantial generation from current facilities).

My personal suggestion for a unified electric america would be to have Texas join the federal grids (i.e. accept national regulation) so that their massive wind and solar can then slosh around the entire continent (similar to how PNW buys most of California's main daytime generator: solar; then offset dips with their own massive hydro). As they operate now, they refuse federal regulation (so don't have any substantial cross-border connections). See: ERCOT (Texas Grid Operator, ideal crony capitalist market IMHO), particularly how they regulate/price MWHs.