President Barack Obama kicked off a fierce election year battle with Republicans by nominating a centrist judge to the Supreme Court and warning his political foes against acting on threats to block him.
Mr Obama on Wednesday named Merrick Garland, 63, to replace Antonin Scalia, a conservative justice who died last month, deliberately choosing an appeals court judge who has in the past won praise from Republicans.
The vacancy left by Scalia has thrust the Supreme Court into the heart of acrimonious election year politics, putting up for grabs the ideological tilt of an institution with a profound influence on American government and society.