What is the reasoning behind the smaller radius vice presidential TFR?

Larry Dighera writes:

If the TFR size is not set because of rational criteria, it
is unreasonable on face, IMNSHO.

If you start eliminating security measures based on rational criteria,
about 95% of them will have to go out the window.

Thanks for the chuckle, but what happens if Jr is bumped off first?
Does Cheney's TFR automatically expand?

That's part of the Single Integrated TFR Calculation Plan (SITFRC), and
it is highly classified.

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