The petition demand the President of the United States end local law that created sanctuary cities. I believe it is a form of anarchy. Anarchy is defined as the condition in society, group of persons, or a single person which does not recognize authority. In this case, the Federal Government.
It can also be seen as a form of secession from the United States of America. This is basically what the Southern States did to start the Civil War. At that time, there was no hesitation by the Northern President and war was declared.
The President can first ask. The second is impose financial sanctions on the city, county/parish and state including putting holds on all existing grants, loans and subsidies. Also, call in all debts including home and college loans.