KENNETT SQUARE, Pennsylvania — On a recent bustling Saturday night, cars parked in an upscale shopping center of this Philadelphia suburb included a healthy minority of license plates from neighboring Delaware. During President Joe Biden’s 36-year Senate career representing Delaware, he and his family were among these types of frequent, and barely, out-of-state visitors.

After all, Biden’s home, to which he is expected to return when he retires from the White House on Jan. 20, 2025, after a single term, is less than 15 miles away, just south of the Delaware state line. Similarly, many Biden neighbors in the leafy Chateau Country estates north of Wilmington, Delaware, find the Chester County, Pennsylvania, borough of Kennett Square, with a population of just over 6,100 people, a convenient spot to shop, eat out, and take care of other daily activities.