Could a superior ground game help tip November's elections toward Democrats? Once again, Democrats are investing more heavily in voter registration and turnout efforts, while Republicans spend a much greater share of their money on television advertising and direct mail. The Upshot has gone through Federal Election Commission filings to add up both parties' expenditures on things like field staff, mileage, and voter contact materials, and the upshot is: One caveat is that this doesn't include the expenditures of groups like the Koch brothers' Americans for Prosperity—they don't have to report field expenses.