Give an inch, they take a mile.
I guess I am more of the type of person that you increase the pressure on both sides until there is so much pressure that both sides come to an agreement.
If one side blinks before maximum pressure, as the case here, then you have lost your leverage. Trump has lost leverage.
The fight might not be fully over, but he has lost all that pressure that was building.
Pressure squeezing both sides like a pimple?