Disney/ABC Television Group president Anne Sweeney is casting a wide net to replace David Westin, who stepped down as president of ABC News last month. The network was rumored to have hired a headhunter to find candidates, but the search so far is being spearheaded in-house, sources said. Sweeney has met with several internal candidates, but no front-runner has yet emerged. “There are viable candidates inside and outside of ABC News,” said one source. “It’s a tough job that requires all kinds of skills.”