WASHINGTON, July 12 (Xinhua) -- U.S. Democratic presidential candidate Barack Obama has listed his former rival, Hillary Rodham Clinton, as one of his vice president potentials, the Los Angeles Times reported on Saturday.

    According to the report, Jill Iscol, a Democratic donor, was told over a phone conversation by Obama that Clinton is one of his running mates candidates.

U.S.Democratic presidential candidate Senator Barack Obama (D-IL) listens to Senator Hillary Clinton (D-NY) speak at a joint campaign rally in Unity, New Hampshire June 27, 2008.

Iscol, who was a faithful supporter of Clinton's presidential campaign, told the newspapers that Obama has reached out to his former rival because he heard she was unhappy about the way she had been treated by the Democratic Party and the media.

    She also recalled that Obama said it would be a mistake not to have Clinton on such a list but her husband, former President Bill Clinton, was a potential "complication" to him.

    "He said once you're a president, even if you're a former president, you're always a president," Iscol said.

    Speculations are increasing on whom the Illinois Senator would choose to be his vice presidential candidate. Those who are considered being on his list include Virginia Governor Tim Kaine, Kansas Governor Kathleen Sebelius, and even Republican Senator Chuck Hagel.

    However, Clinton's supporters have been calling Obama to share the dream ticket with the New York Senator, who has won 18 million popular votes in the primary season.