Why Does Trig Matter?

Jonathan Bernstein asks:

Sullivan believesthat Palin's birth story for her youngest son is implausible.  I thinkhe has a good case for that, for what it's worth.  As I've read overthe last two years, I've seen three possible explanations.  The firstis the wild one, that the baby isn't really hers; she's covering forsomeone else's inconvenient pregnancy and has adopted that child.  Thesecond is that she was an irresponsible mother, and took terrible risksgiven the dangerous nature of the...