Glenn Greenwald wrote a very good post today. It's worth reading in its entorety, but there's one point I wanted to highlight:
"There is one other consideration which, by itself, ought to be determinative. The only branch of government that has shown any residual willingness to defend the Constitution and the rule of law is the judicial branch. But critical Supreme Court decisions such as Hamdan -- which at least affirmed the most minimal and basic constitutional protections -- depend upon the most precarious 5-4 split among the Justices. One of the five pro-Constitution Justices, John Paul Stevens, is 86 years old. If George Bush has free reign to replace Stevens, it will mean that the Supreme Court will be composed of a very young five-Justice majority of absolute worshippers of Executive Power -- Thomas, Scalia, Roberts, Alito and New Justice -- which will control the Court and endorse unlimited executive abuses for decades to come.
In a GOP-controlled Senate, Democrats cannot stop a Supreme Court nominee by filibuster anymore because Republicans will break the rules by declaring the filibuster invalid. The only hope for stopping a full-fledged takeover of the Supreme Court is a Democratic-controlled Senate."
"In the real world, one has to either choose between two more years of uncontrolled Republican rule, or imposing some balance -- even just logjam -- on our Government with a Democratic victory. Or one can decide that it just doesn't matter either way because one has given up on defending the principles and values of our country. But, for better or worse, those are the only real options available, and wishing there were other options doesn't mean that there are any. And there are only six weeks left to choose the option you think is best and to do what you can to bring it to fruition."
We can't have another Justice who believes in virtually limitless Executive power. We just can't. And Glenn is right: the Republicans probably would use the "nuclear option" to get one. Which is why we need the Senate.