Hutchison says the administration's plan is too risky and doesn't secure American access to the International Space Station.
"If you don't look at the stable source of getting people there, how can you say that the mission and goal of science and productivity is going to be achieved?"
Hutchison and other lawmakers also worry about relying on Russian spacecraft in the meantime. NASA administrator Charles Bolden says the President's plan is the best way to secure NASA's future while accounting for budgetary constraints.
"It's my budget. It's my plan. I am here to defend it because I think it's the right thing for us to do."
Hutchison is also pushing to extend the shuttle program and protect Houston area jobs.
Bolden says the course started under President George W. Bush was never well funded and not sustainable.