Shadowy organizations that are legally allowed to hide their donors have pumped nearly $1 billion into the Republican Party's effort to retake the U.S. Senate, according to an NPR analysis released Saturday.
In total, NPR found that "more than $1.6 billion has been spent or booked on TV ads in a dozen Senate races, with $3 out of every $4 being spent in six states — Georgia, Pennsylvania, Arizona, Wisconsin, Nevada and Ohio."
