For two of the most powerful men in the United States, Donald Trump and John Roberts, it has been a delicate dance from the start.

Donald Trump has reacted to the rebuke from Supreme Court Chief Justice John Roberts after the president called for a judge who ruled against him in a deportation case to be impeached.

Roberts, as the head of the federal judiciary, has been facing mounting pressure to protect the courts from political interference. With a lifetime appointment, it remains to be seen whether the 70-year-old Chief Justice will take further steps to defend judicial independence as Trump continues his broadsides against the judiciary.