** Ethel Kennedy endorses Barack Obama

** Sen. Lisa Murkowski endorses Mitt Romney

** Actress and model Mya Harrison endorses Hillary Clinton

** Ex-Sen. Don Nickels endorses John McCain.

** Maine Republicans are caucusing today

** Hillary Clinton has an eight point lead over Barack Obama in Gallup's latest national poll -- 48 to 41 -- and John McCain leads Mitt Romney by 20 points, 44 to 24 -- demolishing the theory that Mr. McCain only has a ceiling of about 35%.

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