As voters in six states head to the polls for primary elections today, they should be feeling highly valued: Outside groups have shelled out nearly $11 million trying to influence how they will cast their ballot. Almost all of the money has been spent in Republican primary elections, reflecting the party's continuing, costly rift. An analysis of independent expenditures — money spent by committees other than the candidate — gathered by Sunlight's Real-Time Influence Explorer shows that all of the spending had concentrated on four states — Georgia, Idaho, Kentucky and Pennsylvania.
Source: Outside groups dump nearly $11M into six primary states - Sunlight Foundation Blog
