The boomlet for Donald Trump as a Republican nominee for President of the United States ought to be a wake-up call for Republican candidates and Republican Party leaders alike. Why has Trump surged ahead of other Republican candidates and potential candidates in the polls? It is not likely that his resurrection of the issue of Barack Obama's birth certificate has aroused all this support. The birth certificate issue does more political damage to Obama's critics than to the president himself, because it enables the media to paint those critics as kooks. Nor are Donald Trump's political positions such as to...