This 30-second ad, being run by a Florida trial lawyer named Dan Newlin in support of former President Donald J. Trump’s campaign, stars Brett Favre, the former N.F.L. quarterback who won a Super Bowl with the Green Bay Packers. It began appearing in Pennsylvania over the past few days. Mr. Newlin said he expected to spend $2.5 million to $3 million on the ad as part of a $10 million television advertising buy in the state. The Favre ad will run frequently during weekend sports and news programs, he said.

Here’s a look at the ad, its accuracy and its major takeaway.

On the Screen

This ad is roughly what you would expect if your friend who does not work on Madison Avenue decided to moonlight in presidential advertising — with the exception that it features one of the greatest quarterbacks of all time.

Mr. Favre, wearing a serious expression, a buzz cut and a sky-blue polo shirt, speaks directly to the camera in what could be his living room. Over his right shoulder are shelves holding family photos and pottery; over his left is a glimpse of trees and possibly a patio. The only graphic that appears identifies him as “Professional Football Hall of Fame QB.”

The most interesting part of the spot is at the end. Viewers are shown a huge blue image reading “Trump 2024” and informed that “Dan Newlin is responsible for the content of this advertisement.” Dan who? The viewer is given no information about Mr. Newlin, save for the toll-free number of his law firm.

The Script

Brett Favre

“I’m Brett Favre, and I’m endorsing Donald Trump in this election. Just look at the situation today. The bloodshed in the Middle East is relentless. Conflicts around the globe are escalating. And President Putin is threatening nuclear action.”

“Pennsylvania, we can’t take a chance. We need a strong leader, and I believe Donald Trump is the right choice to protect our families and restore world peace. So join me and vote Trump.”