How to explain that Polaris is a circumpolar star in the sky of any North America city?
In Miami, Polaris will be approx 25 degrees above the horizon, not 65. Height above the horizon is equal to the latitude of the observer.  At the North Pole, Polaris is very nearly directly overhead, all the time, because the Earth's axis of rotation points very nearly towards it.

Due to precession, Polaris will not always be so close to where the Earth's axis points.