Someone needs to update Wikipedia....
Looking here “He stated in another political discussion that he is an elder in the Presbyterian Church (USA).”
http://www.newsmax.com/Newsfront/hewitt-gotcha-question-trump-fiorina/2015/09/07/id/675565/
it appears that he is a member of a post-Christian denomination. At least French was PCA.
Like so many people I run across, Hewitt “used to be Catholic”. Was raised as one and attended Catholic school in Ohio.
Became a Presbyterian as an adult (think his wife was involved in that somehow). To his credit he quit after they voted to divest from Israel last year.
What he is now exactly no one is sure. Not even Hugh.