NEW YORK (TheWrap.com) - Martha Raddatz, widely praised for her moderation of the vice presidential debate in October, has been given an expanded role as ABC News' chief global affairs correspondent. Jonathan Karl, meanwhile, will become the network's new chief White House correspondent, filling the void left by Jake Tapper's exit to CNN.
Raddatz will replace Tapper as the primary substitute for George Stephanopoulos on "This Week" and will contribute regularly to the Sunday morning show's roundtable. Karl will also serve as a substitute and regularly appear on the roundtable.
Tapper departed ABC in part because he has long been interested in hosting "This Week" full-time, but Stephanopoulos has no plans to give up the hosting job, a person familiar with the situation told TheWrap.
ABC News President Ben Sherwood announced the new assignments for Raddatz and Karl on Thursday, soon after CNN announced Tapper's hiring.
Karl has investigated wasteful federal spending, covered elections, and served as the network's senior national security correspondent.
Raddatz has reported from the Pentagon, the State Department, the White House, and from conflict zones worldwide, including Afghanistan and Iraq.
But she has been perhaps most celebrated for keeping the vice presidential debate between Joe Biden and Paul Ryan on course after the moderator of the first presidential debate, Jim Lehrer, was accused of letting the candidates run amok.