The partisan battle over authorizing the Iran War has shifted to one of semantics, as the sides haggle over a contentious deadline created by a Vietnam-era law. On Friday, the conflict hit the 60-day mark — a critical marker under the 1973 War Powers Act — and Democrats are using the milestone to fuel their efforts to force President Trump to end the military campaign against Tehran immediately, unless Congress explicitly approves it. Trump and his Republican allies are pushing back, arguing that the conflict never rose to the level of a “war,” precluding the need for congressional consent. They also maintain that, even if it did meet that distinction, the current ceasefire has effectively ended the shooting part of the war long before the 60-day threshold was met. The clash is renewing the age-old debate over the separation of powers when it comes to the use of military force.…