Here's where that money has come from, and where it's going.
Traditionally, school board candidates spend $1,000 or less. But one political action committee is spending about 20 times that per race.
There's Arizona's citizen-led initiative in 2022. And voters in Alaska and North Dakota passed similar measures in previous years.
In the final run-up to Election Day, campaigns, parties and outside groups are rushing to spend unprecedented cash on hand.
Most voters have already decided whom they want for president, experts say. Will undecideds vote at all?
More than 100,000 political ads have aired in Iowa so far, up 65% on 2016.
More women are contributing money, and more of that money is backing female candidates.
When President Trump, like his predecessors, stumps for local politicians, local taxpayers foot the bill.