North Korea used love letters to dupe Trump into thinking it was going to get rid of its nukes.
Iran used hostages to dupe Biden into thinking it was not going to develop nukes.
But North Korea was playing Trump to become an even greater nuclear power. And Iran was playing Biden to continue its march towards becoming a nuclear power.
Anyone with half a brain knew it would be thus. Not least because Russia was already playing nuclear godfather to these fellow rogue states.