Those Senate Vacancies

Thus far, we have been speculating about the sorts of vacancies caused by the death or other departure of a single senator. But in an age of nuclear weapons, it is also necessary to contemplate the simultaneous deaths of many more. In such a case, the sheer size of the United States would work in its favor. If (say) a third of the Senate's membership were wiped out in a surprise attack on Washington, the replacement of the dead senators would take place in dozens or even scores of states all over the country.

So the United States Senate is a tough old institution and would be hard to put out of business altogether.