aging

Choice one means no one (say past 70) can run for president, no matter if it is a first or second term. The second choice means no on past a certain age (say 70) could run for first term, and no one past say 74 could run for a second term.

The current presidential election is quite a match up. A reductionist might say it is choosing between a candidate who is becoming mentally feeble and a convicted felon. Both men could become mentally impaired before their terms are up and their average age is about the average age for a man to die in America.