Drawing a parallel between the defence of Ukraine & the attacks on Iran, the Tangerine Tyrant has warned members of NATO that a failure to join the war on Iran will mark a 'very bad future' for the alliance.
However, despite the US (repeated) attempts to make pre-emptive self-defence a international legal norm, its difficult to see what *legal* basis might be for extensive NATO involvement, not that Trump cares about that;
Its just the usual bullying blackmail.