Easily, by proving that most of the fundemental stories that the entire belief is based upon are plagiarised from older stories (not similar, straight out plagiarism) and that dates used and locations for certain events have been scientifically and factually disproven multiple times.
So yeah, it can be and has.
That is not the discussion here, I've already stated that if someone wants to have faith in something regardless of facts, that is entirely their choice but they can't expect it to be the grounds for a Presidential election because just like any major religious official, when confronted with the fallicies in their religion, they'll have nothing to fall back on and stumble on what they "believe" that it makes the entire "base" of their campaign weak.