Supreme Court Chief Justice John Roberts issued a rare public statement on Tuesday, declaring that the impeachment of federal judges is “not an appropriate response” to disagreement with their rulings.

Chief Justice John Roberts pushed back on President Donald Trump’s escalating rhetoric against the federal judiciary on Tuesday in a highly unusual statement that appeared to be aimed at the president’s call to impeach judges who rule against him.

The rare public statement came after the president called for removal of a judge who sought to temporarily block some deportations.