FILE - A boy holds a sign saying "All men are created equal," as he attends a protest on June 7, 2020, near the White House in Washington, over the death of George Floyd, a black man who was in police custody in Minneapolis. “All men are created equal.” Few words in American history are invoked as often as the preamble to the Declaration of Independence, published nearly 250 years ago, and few more difficult to define. (AP Photo/Jacquelyn Martin, File)