Millions of dollars ⁢worth of political TV ads are‍ expected to start airing Tuesday in an ⁣effort⁤ to sway Californians on a November‌ ballot measure seeking to send more Democrats to Congress⁣ and counter President Trump and the GOP agenda, according to television airtime purchases.

The special-election ballot measure – Prop.​ 50 -​ will likely shape control ⁤of the U.S.⁢ House of Representatives and determine the fate of‍ many of Trump’s far-right policies.

The opposition to‌ the rare California mid-decade redistricting has booked more than $10 million of airtime for ads between Tuesday and ‍Sept. 23 in media markets across the state, according to media buyers who are not affiliated with either campaign. Supporters of the effort have⁣ bought at least $2 million in ads starting on Tuesday, ​a number ⁣expected to grow exponentially as they are aggressively trying to secure ⁣time in coming‍ weeks on broadcast ⁢and cable television.

“This early start is a bit stealthy on the part of the no side, but ⁣has been used as a ploy in past campaigns to try to show strength early and gain advantage by forcing the opposing side to play catch up,” said Sheri Sadler, a veteran Democratic political media operative who is not ⁤working for either campaign. “This promises to be an expensive campaign for a⁢ special election, ⁣especially starting so early.”

Millions of dollars have already flowed into the nascent campaigns sparring over the Nov. 4 ⁣special-election ballot measure ⁤that asks voters to set aside the congressional boundaries ‍drawn in 2021 by California’s ‌self-reliant redistricting⁣ commission. The panel was created by the‌ state’s voters in 2010 to ⁤stop gerrymandering and incumbent⁢ protection​ by both major political parties.

The campaign will be a ⁣sprint – ​glossy multi-page mailers arrived in Californians’ mailboxes ⁤before the state Legislature ⁤voted⁢ in late August ⁢to call the special election. Voters will begin ⁤receiving mail ballots ‍in early October.

Redistricting, typically an esoteric process that takes place once a decade ‍following the U.S. Census, is receiving an unusual level of attention ⁤as of partisan efforts to tilt control‌ of Congress in ⁤next year’s midterm election.⁢ Republicans have⁤ a narrow edge in the U.S. House of Representatives,‌ but the party that wins control of the White House‌ frequently enough loses ​congressional seats in the following election.

Earlier this summer, Trump asked Texas Gov. Greg Abbott ‍to redraw his state’s congressional districts to add five GOP members to ⁣the House, setting off a redistricting arms race across the nation. ‍California Gov. Gavin ⁣Newsom launched a campaign to redraw the⁣ state’s congressional districts in an effort to boost the number of Democrats in Congress,‍ negating the ​Texas gains for ‍Republicans, but it must be approved by voters.

the​ coalition opposing the effort is an intriguing mix: former Republican Gov.Arnold Schwarzenegger, wealthy Republican donor Charles Munger Jr., former GOP House