As long as the article is describing what the caucus members believe and why, it is fine for a caucus. The problem arises when the article puts words in the mouths of non-members of the caucus. In this case, the article says:
"The Immaculate Conception of Mary continues to be a major disagreement point by other Christian denominations towards the Catholic faith. Many people say that the Immaculate Conception somehow takes away from Christ's glory and message. Some will say that this belief in Mary is not found in the Bible, or that it blatantly contradicts the Bible's words."