The recent Supreme Court decision to uphold habeas corpus for Guantanamo detainees is a rare victory for our civil rights. The problem, of course is that it never should have been an issue. Also, it just barely passed with a 5-4 majority. Given the fact that the majority judges are all over 68 years old and the dissenters were under 60 except for Scalia at 72. The next President will most likely pick at least one new SCOTUS judge.
McCain and Obama are polar opposites in this regard. Obama supports it and McCain is against it. Also, to use a familiar lightning rod, McCain wants a judge who will overturn Roe v. Wade and Obama does not. For the future of this country we can't afford a McCain presidency.
P.S. Lindsey Graham (R-SC) hates our rights so much he wants to amend the Constitution to overturn this ruling.