Former White House staffer Omarosa Manigault Newman claimed on MSNBC Sunday that she and other members of the Trump administration texted each other the hashtag "#tfa," referring to the 25th Amendment, "more than 100 times" during her tenure to discuss President Trump's "unhinged" actions.

Why it matters: The 25th Amendment can be invoked by the vice president and a majority of the Cabinet to remove a president they consider to be "unable to discharge the powers and duties" of the presidency. It took center stage this week after an anonymous senior White House official claimed that some Cabinet members had discussed using it in a controversial New York Times op-ed.