Medical geneticist Dr. Harry Ostrer (center) talks to the press outside the U.S. Supreme Court on Monday. The court heard oral arguments on the highly charged question of whether human genes can be patented. Mladen Antonov/AFP/Getty Images hide caption

itoggle caption Mladen Antonov/AFP/Getty Images

More than two dozen people bundled up to camp out before the U.S. Supreme Court for a seat to watch oral arguments in a same-sex marriage case on Tuesday. Elise Hu/NPR hide caption

itoggle caption Elise Hu/NPR

The U.S. Supreme Court agreed to hear a challenge to campaign-finance laws that could open the door to further money in politics beyond what Citizens United achieved. Chip Somodevilla/Getty Images hide caption

itoggle caption Chip Somodevilla/Getty Images

Four of the current U.S. Supreme Court justices are over the age of 70, and many expect at least one appointment during Obama's second term. United States Supreme Court hide caption

itoggle caption United States Supreme Court

President Obama waves after signing the Affordable Care Act at the White House on March 23, 2010. Chip Somodevilla/Getty Images hide caption

itoggle caption Chip Somodevilla/Getty Images

Chief Justice John Roberts, shown in 2010, is still "finding his role as chief justice," says one law professor. Paul J. Richards/AFP/Getty Images hide caption

itoggle caption Paul J. Richards/AFP/Getty Images

Pastor Warren H. Stewart of First Institutional Baptist Church in Phoenix joins other clergy members to demonstrate against SB 1070. John Rose/NPR hide caption

itoggle caption John Rose/NPR