The Rationale Behind the Redesign of the Reuters/Ipsos Presidential Ballot Question

Since early June, our Reuters/Ipsos horse race ballot question (Clinton versus Trump) has shown a larger spread (Clinton-Trump) than the average of the market. Specifically, over this time our poll has given Clinton, on average, a 10-point lead, while that of the market has been narrower at 5-points.
So why the

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