Cynically viewed, this is a desperate effort on Lampson's part to preserve as much of the JSC infrastructure as possible (most of JSC is in Texas-9; part of the surround area is in Tom Delay's (Texas-22) district.) Unless the administration signs on to this, it will go nowhere.
I thought there was some ulterior motive, this explains what his motivations are. Guess that makes me a cynic. :)
Unless the public (read Congress) is willing provide the funds, this is an exercise in futility. Furthermore, given past performance, I'm not convinced that NASA deserves the opportunity. Perhaps a public/private joint venture Mars Exploration Consortium independent of NASA would be a better route.
Regardless, this bill is going nowhere. Lampson just needs the reelection issue to gain support from the local space industry voters.