It is supposed to be a national celebration of unity, but America's upcoming 250th anniversary and the events and tributes surrounding it are facing growing political controversy. ––– Subscribe to ABC News on YouTube: https://abcnews.visitlink.me/59aJ1G ABC News is your daily source of breaking national and world news, exclusive interviews and 24/7 live streaming coverage. https://abcnews.com Download the ABC News app for the latest headlines and alerts: https://abcnews.com/devices Connect with