Or if you're feeling really bold, you can go after him for being a Catholic who panders to Protestants.
Ask him which is the higher authority, the bible or the Pope?
Or ask him if he disagrees with the Pope that the Iraq war was immoral.
Santorum didn't do well with Catholics in Iowa, he got the Protestant vote. Protestants are going to pick the NOT Romney candidate, so either get Santorum to repudiate his own faith (Catholicism) or repudiate Protestantism.
Another one, "If you're elected President, which values will you promote, Catholic values or Protestant values?"
I doubt he will remember enough of Kennedy's speech on the spot to wiggle out.
You could probably bring a half dozen people with you and create all sorts of mischief by just asking questions he doesn't want to address.
Of course, this is all in a public thread, so please remember to delete this in a week PJ.
Not that OP is going to do anything, but guerrilla nailed it.
Also, make sure to dress up formal. You want to be taken seriously. Suit and tie, go over and ask him a tough question while someone is recording, then upload and promote it via social media. Be sure to be polite, thank him first for coming and what not. You are challenging an authority, so you better fucking appear smart and civil, not childish.
I particularly like the one about which is higher, the pope or the bible, it is automatic lose lose, unless he was really smart and fast, which he is not.
Hell, maybe even get Ron Paul in there, mention something like:
"Ron Paul Took Such and Such Stance on XYZ Controversial Topic that politicians don't like to talk about, what is your opinion?"
Maybe mention something like "The Pope and Ron Paul agree that the war in Irak is wrong due to the Christian principal of just war, what is your stance on this?"
That way, if it gets attention, you give a little something to RP