While I do not support Congress's action in this matter it is completely within its prerogatives to increase federal court jurisdiction. The USSC refused to hear the initial appeals because it had no jurisdiction under federal law.
Hence, Congress, AS IT IS EMPOWERED by the Constitution to do expanded that jurisdiction to allow the case entry into the federal judiciary.
BUT, and it is a big one, the Judge will review the findings under FLORIDA law not federal. Since the finding is more than likely to be that the courts have followed Florida law the tube will remain pulled. Thus, nothing will change except the GOP can claim it tried to do something.
I'm not so sure about that. I've read that there are several Florida laws that have been violated in this case. One of them being the refusal to appoint a guardian ad litum, and Judge Greer appointing himself as guardian. Also, the fact that Terri was put into a hospice, which under law is only allowed for the terminally ill - plus others which people smarter and more informed than myself can specify. Also, I believe the fact that they will not allow the attempt to feed Terri by mouth...?
Perhaps someone who knows more can expand on this?