Don't know, but if Rockefeller hates it, it's probably a great idea.
Anybody remember Rockefeller's Intelligence Committee memos? Didn't think so.
Interesting that none of the other Democrats voting on this objected.
I suspect that the project involves arming a spacecraft in some way, an idea which gives liberals hives. The fact is that we depend a LOT on orbiting systems, both civilian and military, and at some point defensive systems for such satellites are going to have to be realistically considered. The only thing protecting our geosynchronous satellites right now is the difficulty of reaching that orbit.