Probably not. Mike asked a question about the likelihood of LSN condmning an anti-life position taken by Trump. There was no question of whether they were Catholic or not, just about support or not for a particular position.
Pandora responded by asking if JFK was a catholic, something of a non-sequitur unless you consider Catholicism an integral whole where disagreeing on one issue means you are not catholic. There are apparently a number of posters who take a psoition like that, so their participation in the discussion generally raises the question of whether someone is Catholic. It is the price we pay for hearing the opinions of people who think that way.
To answer P's question, JFK was a catholic, but he did not accept the Church's repeated condemnations of nuclear weapons and mutually assured destruction.