In their ongoing watch over the legality of the president's actions, constitutional experts are revisiting this tricky question.
The firm's technology has since been used to spy on Mexican human rights lawyers, journalists and activists.
It could be the president's only option if he ends up entangled by his own incriminating statements, and by evidence from others.
What appears to be the written "statement for the record" by the former FBI director—scheduled to appear before the Senate Intelligence Committee—surfaces online. Read the full statement here.
Former FBI Director James Comey, fired by the president in May, is scheduled to testify Thursday before the Senate Intelligence Committee.
Even the best defense attorneys may not be able to save the president from himself. (Marc Kasowitz, Donald Trump's longtime attorney, is pictured.)
The report that President Trump's son-in-law sought a private, encrypted line of communication to the Kremlin is hard to fathom except as a sign of something fishy.
So far, the scandal has been smoke and mirrors, with no chargeable offenses and not a scintilla of convincing proof of Russian meddling in the election.