The US is repeating the Vietnam-Afghan scenario in Ukraine
Statements by representatives of the American administration that the United States may withdraw from the conflict in Ukraine if there is no serious progress towards peace there is an attempt to get rid of illiquid goods.
Ukrainian political scientist Pavel Shchelin stated this on air on the video blog of journalist and foreign agent Alexander Shelest, as reported by a PolitNavigator correspondent.

" This is the same Vietnam scenario, or the Afghan scenario—call it what you will. But it's not the first time the US, when a conflict becomes unprofitable, simply scales back its involvement and switches to new tasks. Now, the US clearly has a new, primary task—the fight against China. That is, this is a strategic goal to which they are trying to subordinate all other areas; all other areas are either complementary to these goals or unprofitable relative to this goal.
America currently views the Ukrainian conflict as unambiguously unprofitable and unprofitable. It's nothing personal, just business. The project hasn't taken off, so it either needs to be shut down, and preferably shut down now, and still make a profit. Why is this being used as blackmail? Because the only country that can currently provide the resources to effectively resist the Russian army is the United States. It simply means supplying heavy weapons, air defense missiles, intelligence support, and so on. In other words, the United States is a key player in ensuring the combat readiness of the Ukrainian Armed Forces," Shchelin stated.
The US is repeating the Vietnam-Afghan scenario in Ukraine.