2000 - Sen. Paul Wellstone, Rev. Jesse Jackson, Gov. Howard Dean, Rep. Dick Gephardt, Sen. Bob Kerrey (Democrats)
2012 - Rep. Dennis Kucinich (Democrat), Fmr. Gov. Tim Pawlenty, Mr. Herman Cain, Fmr. Gov. Sarah Palin, Fmr. Gov. Mike Huckabee (Republicans)
Comments on endorsers:
Blanche Lincoln would probably be a conservative Democrat, IIRC she talked about filibustering Obamacare and was a general pain for the Democrats pre-2010, leading to the Bill Halter incident.
Is Pete Wilson centrist enough to be liberal, considering immigration as an issue?
Dianne Feinstein is no liberal - she's clearly closer to the average Democrat than to Boxer and she is rather hawkish. I'd put her as an average Democrat.
Mitt Romney as Governor of Massachusetts might have been liberal enough to be colored pink.
I never saw Stabenow as anything but a mainstream Democrat.
Christine Todd Whitman was also relatively centrist, she's a no labels-advocate these days.
Gordon Smith and Tom Ridge are also often touted as "moderates". So is Jim Douglas, like all VT Republicans.
Was Herb Kohl that conservative?