Mark Steyn

The essence of a government health care system - for people who have never lived under it and don't know - is waiting, waiting, waiting. You wait for everything. You wait for years for operations that are routine in America.

Even if you don't mind Romneycare, or the abortion flip-flop, or any of the rest, there's a more basic problem: He's not a natural campaigner, and on the stump he instinctively recoils from any personal connection with the voters.

To ask questions can become the laziest and wobbliest occupation of a mind, but when you must yourself answer the problem that you have posed, you will meditate your question with care and frame it with precision.

Supplying fuel for a Mars expedition from the lunar surface is often suggested, but it's hard to make it pay off - Moon bases are expensive, and just buying more rockets to launch fuel from Earth is relatively cheap.