NEW YORK (CBSNewYork) – Ahead of Tuesday’s election, a new Sienna Poll shows a turn in the election.

Long Island Democrat, Congressman Tim Bishop, once enjoyed a 10 percentage point lead over Republican challenger, Lee Zeldin, but is now losing by five points, WCBS 880’s Jim Smith reported.

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Sienna College pollster Steven Greenberg says there have been blistering attack ads on both sides.

“The campaign has moved forward such that right now, Zeldin has a narrow lead heading into Election Day,” he said.

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Meanwhile, the GOP on Staten Island is closing ranks with indicted congressman Michael Grimm.

“Republicans in a big way have moved back to Grimm to solidify his date,” Greenberg said.

Grimm is expanding a four-point lead to 19 over Democratic challenger Domenic Recchia.

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