Nonprofits and brands are navigating the partisan air of the 250th in search of a unifying tone

The United States' 250th birthday carries ambitions to galvanize Americans behind nationwide community-service drives and patriotic brand launches. Well-known U.S. nonprofits hope to inspire a record-setting level of volunteerism, while major companies such as Walmart and Coca-Cola are sponsoring tributes and selling limited-edition merchandise.