There is perhaps one advantage worth noting in having a long, looong presidential campaign: You get to see the candidates react to a variety of circumstances. Though, from Barack Obama's angle, that's not precisely an advantage.

In one week's time, Obama:

1. finds himself deeply embarrassed by his pastor's racial rants and by his own inability to explain how he never heard any of these rants during 20 years of church attendance.

2. signals his economic ideas aren't quite ...

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