Trump and his threats to Canada. First, let's look at NATO countries and then Article 5.

[Old Testament Libera]

4. If Trump wanted to invade Canada...

...and Greenland, and Panama, he would need to stop purging the officer corps. Morale and professionalism in the military are all-important. You can't fake military competence.

You can, however, fake business and political skills - which Trump and Musk do every day. So they probably think that their loyalists can fake military leadership.

NATO, by the way, is a treaty ratified by Congress in 1949. A treaty takes precedence over all other law, federal and state. If Trump violates it by invading Canada, or any NATO member (includes Denmark, which administers Greenland) then this is an impeachable offense.