Vice President Kamala Harris’ campaign on Saturday announced it will bombard swing states with $370 million in ads from the day after Labor Day to Election Day. 

The campaign said the media blitz will start Sept. 3 and that most of the money will go toward digital ad reservations. Indeed, the Harris-Walz campaign will spend $200 million for digital ads, which Quentin Fulks and Rob Flaherty, deputy campaign managers, believe is the most by a presidential campaign in history.  

“The Harris-Walz campaign’s advertising strategy is designed to break through a fragmented media environment and reach the voters who will decide this election,” they said in a memo.

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Ms. Harris’ campaign will also spend $170 million on TV advertising during NFL, NBA, NHL, MLB and WNBA games, plus amid the season premieres of “Grey’s Anatomy” and “The Golden Bachelorette.” Campaign ads are also slated to run during “The Wheel of Fortune,” “Abbott Elementary,” “Jeopardy” and “Survivor.” 

Meanwhile, the campaign plans to buy ad reservations on Fox News, “particularly during daytime programming, which reaches a more moderate audience.”

“Our data is clear that the hundreds of thousands of Nikki Haley voters in the battlegrounds and other conservative-leaning independents are moving toward us, and we’ll be meeting them where they are,” Mr. Fulks and Mr. Flaherty said.

The latest eye-popping spending surge comes after a $150 million deluge of ads from the Democratic campaign in seven swing states. 

The Harris-Walz campaign’s ad blitz announcement comes after Make America Great Again Inc., a pro-Trump political action committee, announced it’s shelling out $100 million in ad reservations through Labor Day. 

The ad buy from the super PAC will focus on TV and digital ads in four states — Michigan, Wisconsin, Nevada and North Carolina — while expanding on existing operations in Pennsylvania, Georgia and Arizona.