Senate Winners Aided by $127 Million from Dark Money Groups
Roughly 71 percent of the outside spending for the 10 winning candidates came from groups that don't disclose contributors.
Thom Tillis (R-NC) greets supporters, volunteers and voters on November 4, 2014, at Jetton Park in Cornelius, North Carolina.
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Winning U.S. Senate candidates got a nice boost from groups that don't fully disclose their contributors.
In 10 key Senate contests, the winners benefited from $127 million in outside help from such organizations, according to a report from the Brennan Center for Justice at New York University School of Law.