That should not be the case, and your saying this is an indication of how far America has fallen. You can just look at the Afghanistan withdrawal. That was executed by the 2020-2024 administration to complete an agreement signed by the 2016-2020 administration. It was unpopular and a bad outcome, but the 2020-2024 administration realized a country had to keep its word, even with the Taliban.
If the word of America is not honored that is exactly the disgrace I'm talking about. A nation's word - the treaties they sign, the contracts or agreements they make with people of other countries - has to be honored. Like the conditions of visas.
An administration can change future agreements or renegotiate within the frameworks it agreed to, but it should honor existing agreements. That is one of the many ways a government is not like a corporation.