But Biden’s advertising advantage over Trump is more concerning for the president. Biden out-paced Trump more than 2-to-1 on the airwaves last week, according to the media tracking firm Advertising Analytics.

Preserve America officials have declined to name their donors, which will be revealed in campaign finance filings next month. But senior Republicans have said they expect the group to receive funding from Las Vegas casino mogul Sheldon Adelson and Home Depot co-founder Bernie Marcus.

Adelson, the Republican Party’s most prominent giver, has a long history of cutting seven- and eight-figure checks to super PACs in the closing months of elections. Adelson and his wife, Miriam, have given $50 million to Senate Leadership Fund, a super PAC devoted to protecting the Republican majority in the upper congressional chamber. The couple also gave $20 million to a pro-Trump group during the final weeks of the 2016 campaign.

Preserve America is overseen by Chris LaCivita, a veteran Republican strategist who orchestrated the Swift Boat Veterans for Truth attack ad campaign against John Kerry in 2004. This year, the super PAC has aired a mix of commercials focusing on policing, national security, and the economy, each spotlighting testimonials from everyday people.

“Joe Biden won’t rebuild our economy, he’ll burn it down,” the Wisconsin man, Terry Nelson, says in the new ad.

The spot will begin running later this week in Arizona, Florida, Georgia, Iowa, North Carolina, Pennsylvania and Wisconsin. It will air for two weeks.

Preserve America has spent $68 million on TV commercials so far, with another $12 million on digital ads.

Republican donors decided to launch the new pro-Trump super PAC amid ongoing concerns about the principal organization supporting the president, America First Action.

Still, America First Action and its allied non-profit, America First