Not only that, but IF Ginsberg retires before Obama’s narrow A$$ is kicked out of the White House in January, he will name another liberal to replace the liberal ALREADY there - Ginsberg. The makeup of the court doesn't change. Now, when Scalia or Kennedy decides to retire and they are both getting up there (Scalia is 76 and Kennedy is nearly 76), then the next president will be the one to tip the balance one way or the other.
The REAL travesty in this ruling was the refusal of Kagan to recuse herself due to her personal and extensive involvement on this very law. As chief justice, Roberts should have made some effort to convince her of that.