Source: http://cfinst.org/Press/PReleases/12-10-12/CFI%E2%80%99s_2012_INDEPENDENT_SPENDING_TRACKING_TOOL.aspx
Timestamp: 2019-04-25 10:03:30+00:00

Document:
Election spending by outside groups has played an increasingly prominent role in Congressional elections. To help election watchers follow what is going on in real time, the Campaign Finance Institute will be keeping a running tally on its website of all reported money spent all Senate races along with key races for the House of Representatives. In this first release we take particular note of the ten Senate and four House races with more than $1 million in party and non-party independent spending over the past seven days alone.
Virginia: Kaine v. Allen – $4.3 million ($21.2m cumulatively).
Wisconsin: Baldwin v. Thompson – $3.6 million ($16.5m cumulatively).
Ohio: Brown v. Mandel – $3.3 million ($17.1m cumulatively).
Montana: Tester v. Rehberg – $1.9 million ($12.6m cumulatively).
Florida: Nelson v. Mack – $1.4 million ($13.2m cumulatively).
Connecticut: McMahon v. Murphy – $1.4 million ($3.9m cumulatively).
Maine: King v. Dill v. Summers – $1.2 million ($3.9m cumulatively).
Nevada: Heller v. Berkley – $1.2 million ($13.0m cumulatively).
North Dakota: Berg v. Heitkamp – $1.0 million ($8.1m cumulatively).
Arizona: Carmona v. Flake – $1.0 million ($3.6m cumulatively).
CA-10: Denham v. Hernandez - $1.7 million ($4.1m cumulatively).
IL-11: Biggert v. Foster – $1.6 million ($3.3m cumulatively).
MA-6: Tierney v. Tisei – $1.5 million ($3.4m cumulatively).
IL-17: Schilling v. Bustos – $1.4 million ($4.5m cumulatively).
The New Mexico Senate race between Heather Wilson and Martin Heinrich had $3.4 million in cumulative independent spending, but only $51,345 over the past seven days.
Nebraska’s Senate race between Bob Kerrey and Debra Fisher had $2.6 million cumulative independent spending but only $5 over the past seven days.
Users can sort the data in CFI’s tables on a variety of fields. The tables will be updated frequently between now and Election Day, with changes to be distributed through press releases and social media.

References: v. 
 v. 
 v. 
 v. 
 v. 
 v. 
 v. 
 v. 
 v. 
 v. 
 v. 
 v. 
 v. 
 v. 
 v.