The Harris/Walz campaign says it learned about Ms. Swift’s statement at the same time the rest of us did, though the fact that it wasted less than an hour before selling Swiftian friendship bracelets left a different impression. Regardless, Ms. Swift has a history of thinking long and hard before lending her name to a cause.

Billboard spoke to political consultants, professors and pollsters to see if they think the Swift boat could help lift the Democratic VP into the White House.