Roberts and Kagan prepare for another showdown on executive power

Chief Justice John Roberts and Justice Elena Kagan are well matched, rhetorically forceful opposites. And they have been clashing for more than a decade over an increasingly relevant question of presidential power: How easy should it be for the president to fire the heads of independent agencies?

​ Chief Justice John Roberts and Justice Elena Kagan are well matched, rhetorically forceful opposites. And they have been clashing for more than a decade over an increasingly relevant question of presidential power: How easy should it be for the president to fire the heads of independent agencies? Read More Breaking News, Latest News and Videos | CNN