VoteVets Action Fund is airing an ad highlighting Republican Deb FischerDebra (Deb) Strobel FischerErnst, Fischer to square off for leadership post McConnell will ask Cornyn to stay on GOP leadership team Graham downplays need for bill reining in Trump on tariffs after White House meeting MORE's involvement in a local land dispute -- an attack launched earlier this month by Kerrey's campaign that seems to have taken hold.

"Bob Kerrey fought to protect our land. Deb Fischer fought to take land that wasn’t hers. Ask Deb Fischer if your land is next," a voiceover says.

Fischer sued a local Nebraska family over land boundaries in 1995, and though the family won the case, the suit cost them $40,000 in legal fees. Kerrey's campaign has run emotionally-tinged ads featuring residents of the area condemning Fischer for her role in the dispute.

And that attack may be helping Kerrey to a last-minute surge. A recent Omaha World-Herald poll showed him just 3 percentage points behind Fischer, with her support dropping 7 percentage points since the last poll, in September. She now has 49 percent support to Kerrey's 46 percent support.

Kerrey is also rolling out the endorsement of former Republican Sen. Chuck HagelCharles (Chuck) Timothy HagelOvernight Defense: Latest on historic Korea summit | Trump says 'many people' interested in VA job | Pompeo thinks Trump likely to leave Iran deal Should Mike Pompeo be confirmed? Intel chief: Federal debt poses 'dire threat' to national security MORE, a well-known and well-respected figure in Nebraska politics.

His newfound strength has sparked a sudden influx of outside spending from both sides, with Republicans attempting to shore up their chances in Fischer and Democrats seeing a potential opening.

VoteVets is also launching an ad in Ohio, backed by $200,000, and expanding its recent joint buy with the United Food and Commercial Workers in Virginia by $750,000. Both of those ads return to what is typically VoteVets' focus: Veterans' issues, and how the Republican in the race would be detrimental to them.