Tammy Duckworth celebrates with husband Bryan Bowlsbey after defeating Rep. Joe Walsh in Elk Grove Village on Tuesday in the 8th Congressional District. (AP Photo/Paul Beaty)

In the waning days of the campaign, Freedom Works dumped more than $1 million into the 8th congressional race to stave off a challenge to Joe Walsh from Democrat Tammy Duckworth.

In all, the SuperPAC plowed nearly $3 million into the campaign.

Ultimately, it didn't pay off. Duckworth beat Walsh by 10 percentage points.

Elsewhere, Freedomworks has a "low batting average," according to opensecrets.org, which ranked it the sixth top-spending super PAC this election by plowing $19 million into campaigns.