Washington - Barack Obama's grandmother, who helped raise the Democratic presidential candidate in Hawaii, passed away Monday after a prolonged battle with cancer.
Madelyn Dunham, 85, had been gravely ill for weeks, prompting Obama to interrupt his campaign for a few days last month to visit her in Honolulu, Hawaii.
"She was the cornerstone of our family and a woman of extraordinary accomplishment, strength and humility," read a statement from Obama and his half-sister, Maya Soetoro-Ng. "Our debt to her is beyond measure."