Doctor Thomas Sowell is always a great read. Today’s no exception. (Real Clear Politics) 
By far the best presentation as a candidate, among all the candidates in both parties, is that of Barack Obama. But if he actually believes even half of the irresponsible nonsense he talks, he would be an utter disaster in the White House.
Among the Democrats, the choice between John Edwards and Barack Obama depends on whether you prefer glib demagoguery in its plain vanilla form or spiced with a little style and color.
The choice between both of them and Hillary Clinton depends on whether you prefer male or female demagoguery.
Among the Republicans, there are misgivings about the track record of each of the candidates, especially those who have shown what Thorstein Veblen once called “a versatility of convictions.”
There are fewer reasons for misgivings about Fred Thompson’s track record in the Senate but more reason to be concerned about what his unfocused and lackluster conduct of his campaign might portend for his performance in the White House.
When it comes to personal temperament, Governor Romney would rate the highest for his even keel, regardless of what events are swirling around him, with Rudolph Giuliani a close second.
Temperament is far more important for a President than for a candidate. A President has to be on an even keel 24/7, for four long years, despite crises that can break out anywhere in the world at any time.
John McCain trails the pack in the temperament department, with his volatile, arrogant, and abrasive know-it-all attitude. His track record in the Senate is full of the betrayals of Republican supporters that have been the party’s biggest failing over the years and its Achilles heel politically.
That pretty well sums it.
Read the whole thing, though. Doctor Sowell’s writings always have a flavor to them to be savored.