article_snippet: her retirement is certain to set off a race among potential candidates to succeed her, including Democratic Reps. Chris Van Hollen and Donna Edwards, and former Govs.
article_snippet: Martin O'Malley, who is considering a bid for the Democratic presidential nomination, and Republican Bob Ehrlich.
article_snippet: Robert C. Byrd of West Virginia and Daniel Inouye, Hawaii, both Democrats.
highlights_snippet: Chris Van Hollen and Donna Edwards, and former Govs.
highlights_snippet: Martin O'Malley and Bob Ehrlich, could all run to replace her .
  