Casey's seat had long been considered relatively safe, but a few recent polls have shown his once-commanding lead significantly whittled, with a late September Quinnipiac poll putting the lead at just 6 point. Casey has been significantly outspent on the airwaves up to this point in the campaign. The poll was conducted Oct. 1-5, and surveyed 545 likely voters. The margin of error is plus-or-minus 4.2 percentage points.
Poll: Casey Leads by 9 in Pennsylvania
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