President Donald Trump tweeted on Tuesday night that the Democrats’ investigation into the Ukraine scandal “is not an impeachment, it is a COUP” — an authoritarian rhetorical escalation that shows how unstable American politics could become as the impeachment process goes on.
Definitionally, a coup refers to the overthrow of a leader by the country’s security forces. Obviously, that’s not what’s happening here: House Democrats are initiating a legal process for removing the president enshrined in the Constitution, pretty much the opposite of an extrajudicial overthrow of a leader by military force.
By labeling impeachment a “coup,” Trump is …