With Election Day nearly upon us, U.S. campaign ad spending levels continue to skyrocket. Here’s what you need to know right now:

• Total measured campaign ad spending for U.S. Senate, U.S. House, gubernatorial and other key races in the U.S. midterm elections has surged past $4.6 billion, according to the latest Ad Age Campaign Ad Scorecard analysis. Campaign Ad Scorecard is part of Ad Age’s Campaign Trail coverage, a project of Ad Age Datacenter, led by Director of Data Management Kevin Brown in partnership with Kantar/CMAG. (For more details, scroll down to see our in-depth charts.)

• That $4.6 billion total includes TV, radio and tracked digital advertising (from Dec. 28, 2021, through Election Day, as of Oct. 31, 2022).

• Republicans and Democrats have near-parity—$1.99 billion vs. $1.97 billion, respectively—in their ad-spending contributions to the $4.6 billion total. (Independents and issue-oriented advertising, such as ballot initiatives, account for another $650 million.) Republicans have been outspending Democrats on U.S. Senate races ($776 million vs. $718 million) and gubernatorial races ($571 million vs. $522 million). Democrats, meanwhile, have been outspending Republicans on U.S. House races ($586 million vs. $581 million).

• Total U.S. Senate race ad spending now sits at $1.5 billion.

• Of that $1.5 billion, candidates spent 38%, while PACs and the two major political parties spent 62%—though spending by Republican PACs skews the ratios. While Democrat campaigns and PACs/party are split 50/50 in spending, Republican campaigns accounted for just 27% of spending, vs. 73% spent by PACs and the GOP combined.

• The six U.S. Senate races that have racked up more than $100 million in ad spending have been happening in the most predictable of places: battleground states. Georgia is at $222 million; Pennsylvania, $210 million; Arizona, $163 million; Wisconsin, $154 million; Ohio, $137 million; and Nevada, $127 million.

• Just the U.S. Senate races in just those six states have racked up $1 billion in campaign ad spending.

• Kantar/CMAG recently raised its total ad spending forecast for the midterms to $9 billion—which includes ad outlays for additional campaigns and media beyond the nationally significant races that Ad Age Datacenter tracks. As Kantar/CMAG’s Steve Passwaiter noted in an Oct. 9 Ad Age guest post, good old-fashioned TV is still getting the lion’s share of the windfall, though digital platforms continue to rise. Per Kantar’s forecast, the $9 billion will break down to: $4.6 billion for local broadcast TV, $1.4 billion for OTT, $1.5 billion for local cable TV/satellite, $1.2 billion for Facebook and Google and $300 million for local radio.