Former US President George W. Bush shakes hands with María Corina Machado (left), then executive director of Sumate, in the Oval Office of the White House in Washington, DC, May 31, 2005. Photo: Alex Wong/Getty Images/File photo.

Former US President George W. Bush shakes hands with María Corina Machado (left), then executive director of Sumate, in the Oval Office of the White House in Washington, DC, May 31, 2005. Photo: Alex Wong/Getty Images/File photo.