Pronouns almost always must refer to the answer. Use pronouns carefully so as not to mislead the players. Poor antecedent usage is most often the culprit in poorly-written questions. This question tricks a player into answering Bismarck early. Minimize Ambiguous Introductions.
Some questions have several possible answers after a few words have been read.
Agnew is not the only answer. Calhoun had similar, if less widely known, difficulties in his time. Some players will interrupt the question at this point. Players who are waiting to differentiate between Agnew and Calhoun will be at a disadvantage to other players who are thinking of only Agnew. Or, a player who is aware of Calhoun may bet the odds and incorrectly answer Agnew.