an american service member is suspected of killing two u.s. soldiers and wounding another in iraq. the defense department is now investigating. another high-profile departure from the obama white house looking all but certain this morning. rahm emanuel, the president's chief of staff expected to announce on friday that he is stepping down in order to run for mayor of chicago. sources telling cnn deputy chief of staff peter rouse could be named interim chief during the search. wisconsin's governor declaring a state of emergency in columbia county after heavy rains pushed the wisconsin river near portage to an all-time high. the river is expected to peak again today. officials say at least 100 homes are in danger. the mayor says that local prison inmates are helping with sandbagging around a levee that started crumbling over the weekend. country comes home tonight for the first time since flood waters nearly destroyed it five months ago.