"Since war is not an act of senseless passion but is controlled by its political object, the value of this object must determine the sacrifices to be made for it in magnitude and also in duration. Once the expenditure of effort exceeds the value of the political object, the object must be renounced and peace must follow."
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Clausewitz would have been flabbergasted by this war. If we're being overly generous to Trump, we might call it an act of senseless passion. The reality is probably worse. The U.S. still hasn't seemed to figure out what it's policy goals or winning conditions are, aside from the president's desire to be an all-powerful winner. Trump seemingly places no value on his nation's blood or treasure, so it might be a very long time before he begins to feel the effort his nation is expending isn't worth the value of his own vanity.
The U.S. needs to have its magna carta moment and reign in its mad king. Maybe that will come with the mid-terms, or maybe this war will drag on for two more years. Trump isn't going to stop it, now or after the mid-terms. As far as he's concerned, the pain isn't his.