PITTSBURGH — On a cool Saturday morning, roughly two dozen volunteers gathered at the Jacob Center with one goal in mind: to persuade as many voters in the area to support former President Donald Trump over Vice President Kamala Harris in their battle for the White House.

Many of the Trump Force 47 volunteers would go out in pairs to knock on doors in the surrounding neighborhoods in Pennsylvania, while others would stay behind and phone bank on behalf of the former president’s campaign.