Clinton Mentions Kennedy Killing

SIOUX FALLS, South Dakota -- Hillary Clinton mentioned the June 1968 assassination of Robert Kennedy in explaining on Friday why she had resisted calls to end her White House bid, drawing a rebuke from Democratic front-runner Barack Obama's campaign.

Clinton, who later expressed regret over the remark, made it to the editorial board of a South Dakota newspaper, the Sioux Falls Argus Leader, when explaining that other races for the Democratic presidential nomination had lasted into June.

"My husband [Bill Clinton] did not wrap up the nomination in 1992 until he won the California primary somewhere in the middle of June, right? We all remember Bobby Kennedy was assassinated in June in California," she said.

"I don't understand it," Clinton said, referring to calls for her to pull out of the Democratic race in which the final nominating primaries are held on June 3 in South Dakota and Montana. The Democratic nominee will face Republican John McCain in the November election.