Invoking the #NATO treaties collective defense clause, known as #Article5, under which an attack on one member is regarded as an attack on all, requires the #unanimity of all 32 #allies. The #US, of course, would reject any plea for help by #Denmark — effectively neutering the #treaty.
“Article 5 did not anticipate that the invading country would be a member of NATO,” Sen. Chris Murphy (D-CT) told reporters asking about bill in #Congress to prohibit #Trump for acting in #Greenland.