Here is a libertarian writing about Trig.
‘Palin’s Down syndrome child and the right to abortion’
“Like many, I am troubled by the implications of Alaska governor and Republican Vice Presidential candidate Sarah Palin’s decision to knowingly give birth to a child disabled with Down syndrome. Given that Palin’s decision is being celebrated in some quarters, it is crucial to reaffirm the morality of aborting a fetus diagnosed with Down syndrome (or by extension, any unborn fetus)—a freedom that anti-abortion advocates seek to deny.”
(snip)
“ At Noodlefood, Diana Hsieh condemns such a stand as “the worship of retardation.” Given that Palin had complete foreknowledge of her child’s severe disability yet nevertheless chose to have it, it is hard not to see her choice as anything less.”
http://ruleofreason.blogspot.com/2008/09/palins-down-syndrome-child-and-right-to.htm
Provenzo is a Objectivist, i.e. a follower of Ayn rand, not a Libertarian.