John Roberts is the current Chief Justice of the Supreme Court. President George W. Bush nominated him to be an Associate Justice to the Court in 2005. After the death of Chief Justice William Rehnquist in October of that year, he was renominated by President Bush to be Chief Justice. He is also a former member of The Heritage Foundation.
Roberts is a member of the conservative majority on the Court. Though not as extreme as Justice Alito and Justice Scalia, nor as wacky "who cares what the Constitution says, I'm the Judge" as Justice Thomas, Chief Justice Roberts is the 4th piece of Conservative Banc, often a majority when Justice Kennedy votes towards his more conservative bent. In 2012 he was the key vote in holding up President Obama's Affordable Care Act.