United States President Barack Obama, center, introduces Judge Merrick Garland, chief justice for the US Court of Appeals for the District of Columbia Circuit, right, as his nominee to replace the late Associate Justice Antonin Scalia on the U.S. Supreme Court in the Rose Garden of the White House in Washington, D.C. on Wednesday, March 16, 2016. US Vice President Joe Biden looks on from left.<br /> Credit: Ron Sachs / CNP