Just as ABC was denying talk that it is planning to dump This Week vets Sam Donaldson and Cokie Roberts as part of a radical overhaul of the Sunday morning news program, Roberts confirmed that come November, she's history. The venerable journalist, however, is not leaving the network altogether. Says Roberts: "We've started very preliminary conversations about what other role I might play at ABC." Meanwhile, Donaldson was quoted as describing the current situation at ABC News as "chaos, dark night and the abyss."