> Mr. Trump’s aides have repeatedly warned him that his cellphone calls are not secure, and they have told him that Russian spies are routinely eavesdropping on the calls, as well. But aides say the voluble president, who has been pressured into using his secure White House landline more often these days, has still refused to give up his iPhones. How is blatant disregard for communication security not an impeachable…
The president can declassify anything he wants to, merely by speaking it to someone else. He's the only person in or out of the government who can do this. So, not impeachable. Impeachable would be when the former Secretary of State did not exercise care when handling classified information. The relevant statute does not require intent - only lack of care. It is interesting that all the push back by governments to ke…
The phrase "high crimes and misdemeanors" means the opposite of what people intuitively think. Elected officials entrusted with state powers are held (or were at the time of the founding deemed to be held) to higher ethical and moral standards than regular citizens. A "high crime" would be misbehavior by someone in a high office. See https://en.wikipedia.org/wiki/High_crimes_and_misdemeanors
Wantonly reckless behavior wrt to national security is, I would hope, indisputably impeachable. But in any event what's impeachable is entirely up to Congress as a practical matter--their decision is unreviewable except by the ballot box.