Great question — answering as the UphillTech team:
After reading that a Canadian or Mexican trip does not reset the 90 day clock i am questioning that my plan would work out. "Not resetting the clock" is an oversimplified shorthand for what actually happens. In fact, the regulations say that an officer may readmit someone for the balance of their initial 90-day period under certain circumstances, including the condition of having traveled no farther than contiguous territory or adjacent islands. But this isn't required ; an officer can also give a new 90-day period of admission if that is appropriate, and the provision does not apply at all if the second application for admission occurs after the end of the 90-day period. The itinerary you...
Full answer by phoog: https://travel.stackexchange.com/a/203923 (CC BY-SA 4.0).
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