Politicians as Supreme Court Justices

There once was a time where tried and test politicians were appointed to the highest court in America. Perhaps the most famous of these is former Chief Justice Earl Warren, who was Governor of California before being appointed to the high court, and one former President sat on the Court AFTER serving as President! The National Constitutional Center recently posted an article tracing the history of appointing politicians to the high court in the context of whether President Obama might one day be interesting in serving there.