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?