What comes after ignoring the courts?

With the recent actions this administration is taking and their stance on ignoring court orders, at what point will someone from within the administration stand up and say "hey, we can't do this?" And if so, what happens?

Will there be a coup of sorts?

Will the 25th Amendment be invoked at some point? By whom?

What will be the final straw that breaks the camel's back? What will it take?

My fear is that this administration will continue to ignore lawful court orders and just keep doing what they want. This administration is nearly following a certain political playbook from the 1930s scarily similarly.

This isn't how America works, nor should it be. There are checks and balances in place for a reason, as the Founding Fathers had the foresight to know some usurper would try and "King" themselves some day.