In: Sen. Tom Harkin (D-IA), Gov. John Kitzhaber (D-OR), Gov. Phil Bredesen (D-TN), Gov. Kathleen Sebelius (D-KS).  Out: John Podesta, Mitt Romney.  Bredesen, I am told by a good source, is a serious prospect; not sure about Harkin or Kitzhaber.  A key Democrat who works with the White House on health care is worried about Bredesen, e-mailing me last night that he "does not share the President's principles" on health care.  Here's some background on that.

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