The final decision to go or not go, and the timing of when hostilities commence, are known to Donald Trump and Donald Trump alone. As to the "if" question, we'll get to the "when" part later, Donald Trump subtly changed his ultimatum this week. In short, Donald Trump has given them about as much time to comply as he can without looking like he's backing down. But Putin seems to have all he can handle with the Ukranians, and Donald Trump playing havoc with the illicit oil shipment trade. That's where the will of Donald Trump and the American military come in.