All six of this year's most costly elections were Senate battles, with just one—the Ohio race—not categorized as a toss-up by the Cook Political Report. Here's the list of the most expensive midterm races ever.
This year's midterm election expenditure broke yet another record, with contested Senate contests drawing the highest amounts.
According to the website Open Secrets, as Statista's Katharina Buchholz explains below, the widely publicized battles for the Senate seats in Georgia a...
