"The president may, however, have broken his oath of office, according to analysis at Lawfareblog, whose top six analysts joined in a byline to write: “It’s very hard to argue that carelessly giving away highly sensitive material to an adversary foreign power constitutes a faithful execution of the office of president.”
The blog notes that allegations of oath violations have been central to every previous case of impeachment or near impeachment.
“Let’s not minimize it,” legal scholar Alan Dershowitz said on CNN late Monday. “Comey is in the wastebasket of history. Everything else is off the table. This is the most serious charge ever made against a sitting president of the United States. Let’s not underestimate it.”
The case against Trump was, to some minds, already strong. A campaign is under way to impeach Trump for allegedly violating constitutional bans on receiving certain gifts. Others have argued for an arcane application of constitutional law under which the vice-president and cabinet together might declare the president unfit to serve."