I saw it too. I wouldn't mind them calling Carter "a Nobel Laureate and the only President to welcome the Pope to the Whitehouse" if they had called Clinton "the only President publicly criticized by the Pope". Both are true.
Did you notice that they didn't ask why Clinton didn't give up his seat to Carter?
Great point.
I'm kind of surprised Clinton wants to go -- I'm remembering Cardinal O'Connor's funeral in New York, when the homilist praised Cardinal O'Connor's firm anti-abortion stance and got a standing ovation (yes, in St. Patrick's Cathedral!). Clinton, Hill and the Gores sat through it, not clapping, looking uncomfortable and pretending they didn't hear it, fidgeting as though they were looking for something.