Mexican civilian leadership tried to talk Scott into taking up the cause of annexing all of Mexico with Polk. Scott was not going to do that. Scott being a Southern Whig already had enough problems with Polk. Polk would likely interrupt Scott’s actions as furthering his presidential ambitions. Then the Mexican grandees offer Scott the dictatorship of Mexico. They probably figured better him then some other puffed-up Mexican military\civilian incompetent. Scott of course said no to that!
In reality Mexico would have been far better off if we had kept it and made it a part of the US.
Typo
interpret = interrupt