"Surprisingly, NASA has not proposed a single dollar for the development of an upper stage engine that is absolutely necessary for a crewed mission that is only seven years away."
Keith's note: Of course Shelby forgets that $1.2 billion NASA spent on the J-2X for use on Ares V and SLS upper stages - much of it was spent in Alabama. That engine was subsequently mothballed because NASA had no idea what it was doing. But Shelby paid their bills anyway.
Overview: J-2X Engine, NASA
"J-2X is a highly efficient and versatile advanced rocket engine with the ideal thrust and performance characteristics to power the upper stage of NASA's Space Launch System, a new heavy-lift launch vehicle capable of missions beyond low-Earth orbit. Fueled by liquid oxygen and liquid hydrogen, the J-2X builds on heritage designs but relies on nearly a half-century of NASA spaceflight experience and technological and manufacturing advances to deliver up to 294,000 pounds of thrust, powering exploration to new destinations in our solar system."
NASA Has No Clear Use for the J-2X That It Once Needed, earlier post