"We continue to hear that the SLS/MPCV system will serve as a back-up for Earth-to-orbit transportation in the unlikely event that none of the other systems in development are successful. Last year's request for this "back-up system" was more than 300% of the appropriated level of the primary system. By acting on this type of faulty logic, we have created a national debt as large as our GDP and still our nation refuses to take its foot off the deficit spending accelerator. SLS is unaffordable, and with relatively modest expenditures on specific technology development, we do not need a heavy lift vehicle of that class to explore the Moon, Mars, or near-Earth asteroids."
"While NASA's Commercial Crew program could be the primary means of transporting American astronauts, we cannot be solely reliant on this program. The Orion MPCV, Space Launch System, and Commercial Crew programs require a program track with a sufficient budget to support the Space Station as soon as possible in preparation for the next steps of human exploration beyond Low Earth Orbit and ensure American preeminence in space."
Keith's note: It would seem that the Chairman and the Vice Chairman of the House Committee on Science, Space, and Technology have a fundamental disagreement when it comes to the implementation of NASA's human and commercial space flight priorities.