Sanders and Trump have spent months going after Clinton. A debate would've been the perfect chance for them to attack her uncontested.
PHOTO GALLERY: An Ultra-Orthodox Jewish boy watches a bonfire during a religious celebration in Jerusalem; protesters run from tear gas fired by Iraqi security forces in Baghdad; people walk through heavy rain during a storm in Cuzco, Peru
China's largest private property developer, the Wanda Group, has opened a sprawling entertainment complex in southeast China that it is positioning as a competitor to take on Disney and its $5.5 billion Shanghai theme park opening next month
The courtroom fight between former pro wrestler Hulk Hogan and news-and-gossip site Gawker is becoming a battleground for Silicon Valley tycoons as well
The frantic search for teenage girl who was last seen being dragged, bleeding and screaming, by an armed acquaintance has shifted to a remote area in Northern California about 65 miles from where she was abducted
Officials in Texas are bracing for the possibility of more rain over the long Memorial Day weekend after flooding there killed one person and left three others missing
Democratic presidential candidate Hillary Clinton urges supporters of rival Bernie Sanders to join her to stop Donald Trump from occupying the White House. Rough Cut (no reporter narration).
The Education Department has appointed a new lawyer to oversee the turnaround of schools once owned by Corinthian Colleges Inc., following an Associated Press review that found trouble at the schools and questioned the previous monitor's independence
Police say a small plane has crashed in the Hudson River between New York and New Jersey, and aviation authorities say it may be a World War II-era plane
Donald Trump's penchant for encouraging rivalries and pitting even those closest to him against each other is roiling his Republican presidential campaign
Authorities were searching a 300-mile stretch of California for a teenage girl with hopes of finding her alive after the man suspected of abducting her was killed in a shootout with deputies
The Department of Homeland Security is disciplining dozens of Secret Service workers who illegally accessed a rejected job application.
Striking Verizon employees may be back to work next week, after the company and its unions reached an agreement in principle on a new four-year contract
The sister of a 15-year-old girl who was abducted at gunpoint says she had heard the name of the suspect in the kidnapping but didn't know him
The ex-owner of an abandoned North Texas mortuary where bodies were found unattended has pleaded guilty to nine misdemeanor counts of abuse of a corpse