Unless you have seen it first first-hand, as part of the press scrum or as a campaign staffer, it is almost impossible to imagine how grueling the process of running for national office is. Everybody gets exhausted. The candidates have to answer questions and offer views roughly 18 hours a day, and any misstatement on any topic can get them in trouble. Why do candidates so often stick to a stump speech that they repeat event after event and day after day? Because they've worked out the exact way to put their positions on endless thorny issues -- Iraq, abortion, the Middle East, you name it -- and they know that creative variation mainly opens new complications.
If someone is campaigning for the presidency or vice presidency, there's an extra twist. That person has to have a line of argument to offer on any conceivable issue. Quick, without pausing in the next ninety seconds, tell me what you think about: the balance of relations between Taiwan and mainland China, and exactly what signals we're sending to Hamas, and what we think about Russia's role in the G-8 and potentially in NATO, and where North Korea stands on its nuclear pledges -- plus Iran while we're at it, plus the EU after the Irish vote, plus cap-and-trade as applied to India and China, and what's the right future for South Ossetia; and let's not even start on domestic issues.