I had honestly not given a 2nd thought to this rumor before. It struck me as just worthless and pointless tabloid gossip. But after reading this article from (conservative) Andrew Sullivan and checking out the relevant pics and vids (one is from FoxNews even!), I gotta say it does seem pretty questionable:
http://andrewsullivan.theatlantic.com/the_daily_dish/2008/12/a-fourth-pictur.html?
She used Trig repeatedly as a political icon of her own "conservative" principles (she didn't abort a baby she knew would be retarded and she had special cred to fight for other parents of developmentally disabled kids), so it is relevant whether or not the baby is actually hers....
http://andrewsullivan.theatlantic.com/the_daily_dish/2008/12/a-fourth-pictur.html?
She used Trig repeatedly as a political icon of her own "conservative" principles (she didn't abort a baby she knew would be retarded and she had special cred to fight for other parents of developmentally disabled kids), so it is relevant whether or not the baby is actually hers....