Passage Summary: A poll shows one candidate leading by a wide margin, but the author argues the results aren't reliable because the survey was taken in a location that favors that candidate's specific voter base.

Conclusion: The findings of the recent election poll are questionable.

Reasoning: The poll was conducted at expensive shopping malls, which likely resulted in an overrepresentation of Perkins's upper-middle-class supporters.

Analysis: The main conclusion is found in the first sentence: the results are 'dubious.' The word 'because' immediately follows this claim, signaling that the rest of the passage is intended to provide supporting evidence. The second sentence further supports the conclusion by explaining why the sampling method (high-priced malls) led to the 'unrepresentative' sample mentioned in the first sentence. Your task is simply to identify the claim that the evidence is meant to prove.