American Crossroads, the juggernaut GOP-aligned super PAC co-founded by Karl Rove, has bought $3 million worth of TV time for the week of Oct. 14 in the New Hampshire US Senate race, according a Republican familiar with the massive TV buy.
The big influx of money into the race could be a huge boon to the candidacy of Republican Scott Brown, who polls have find in a tight contest with incumbent Democratic Senator Jeanne Shaheen.
The buy, according to the Republican, is on cable and broadcast television in New Hampshire and also includes broadcast stations in the Boston media market, which reach a wide swath of residents in the southern part of the Granite State.
Crossroads rarely airs positive ads, so the money is likely to be spent savaging Shaheen.
Outside groups, aligned with both sides, have already spent heavily on the contest that pits Brown, the former Massachusetts senator, against Shaheen, a former governor.
But the new influx of money could help tip the balance so close to the Nov. 4 general election.
It's unclear how much Crossroads plans to spend in the final two weeks of the New Hampshire US Senate race.