More than $12 million has already been spent to sway the outcome of Minnesota's Eighth Congressional District election.
The vast majority, almost $9 million, has come from outside groups.
The parties, the PACs the interest groups have poured on the cash to re-elect Democratic Rep. Rick Nolan or replace him with Republican challenger Stewart Mills.
The result is that viewers of Eighth District television could see more than 100 ads in the district during the final week -- as well as dozens from supporters and the candidates for U.S. Senate, governor and down ticket races. There are so many ads flooding the northern Minnesota district that television stations are increasing the cost of ads.
Only some of those ads will be directly from U.S. House candidates. Both Nolan and Mills have raised significant cash but neither can compete with the horde of interest groups making their wishes known.
The outside money has largely gone to tear down Nolan and Mills. According to public data, groups have spent $4 million to oppose Mills and almost $3.5 million to oppose Nolan.
With expenditures of $3 million and $2.4 million, respectively, the Democratic Congressional Campaign Committee and the National Republican Congressional Committee are the biggest investors in the district's outcome.
The Rothenberg Political Report recently changed its rating of the race to "Toss-up/Tilt Democrat".
Here's a look at the candidates' fundraising:
Updated