Truth be told, your question was ridiculous. Comparing a document to a man is like comparing apples and oranges.
Popes come and go. Any Catholic man can be pope. The teachings of the Church and pope give are more important than the particular man himself, although our current pope is certainly a good one.
And why would you think for an instant that I care a flying rats hindquarters what a Kennedy says?
It is the pope lets not play word games ...
That takes catholics out of the presidential role..