“The President, Vice President and all civil Officers of the United States, shall be removed from Office on Impeachment for, and Conviction of, Treason, Bribery, or other high Crimes and Misdemeanors.”
It’s my view that an offense punishable by law is required for non-judicial impeachment.
“The Judges, both of the supreme and inferior Courts, shall hold their Offices during good Behaviour”
Judges can be impeached for putting their elbows on a table.
To get there, they have to make the common uncommon; they have to turn the normal quid pro quo of foreign aid policy into criminal bribery.