OpenSecrets.org @OpenSecretsDC
The top 10 most expensive congressional races tracked by OpenSecrets this election cycle are all U.S. Senate contests in battleground states, and three of the top 10 are considered toss-ups by @CookPolitical. https://t.co/qZPSLgg8cN https://t.co/WvTNcC7S3h — PolitiTweet.org