Over the course of their tenure, Supreme Court justices tend to vote according to political affiliation. Only two of the current justices were appointed by Democratic Presidents. I am not concerned by the makeup of the court. Conservative or liberal, all justices tend to take seriously their duty to protect the individual's Constitutional rights and the rule of law.
So, while the court went out of its way to hand over the Presidency to Bush the usurper, they are in no hurry to let him turn the country into a fascist dictatorship, as is his want. I would certainly like to see a Democratic President appoint some more liberal judges to the bench but it is not that important. As long as the justices are men and women of intelligence and reason and seek that path which is of greatest benefit to the citizens continued personal autonomy, no long term damage to the evolution of the Republic will be done. I do not think that at present, there is even a single justice on the Supreme Court, that would rule to seriously damage the rights that we as citizens enjoy.
We can only hope that whoever is elected President in November, will continue to put up appointees for the Supreme Court who seek to serve the best interests of the American people.