The National Republican Congressional Committee is spending $280,000 to blanket the airwaves in the district from Oct. 30 through Nov. 6.

The news comes as an independent poll of the race put Doherty just 6 percentage points behind Cicilline, within that poll's margin of error. The district, however, is heavily Democratic, and Cicilline recently received President Obama's endorsement.

The Democratic Congressional Campaign Committee is not yet on the airwaves in the race, but that could change in coming weeks.