The New York Times reported Thursday:

Mr. Obama is fast becoming the past, not the future, for donors, activists and Democratic strategists. Party leaders are increasingly turning toward Mrs. Clinton and her husband, former President Bill Clinton, as Democrats face difficult races this fall in states where the president is especially unpopular, and her aides are making plain that she has no intention of running for “Obama’s third term.”

Which put me in mind of this statement famously attributed to another woman who had “the heart and stomach of a king” and the will to rule, Queen Elizabeth I:

I know the inconstancy of the English people, how they ever mislike the present government and have their eyes fixed upon that person who is next to succeed. More people adore the rising sun than the setting sun.

Which is why Elizabeth never designated a successor. Every incumbent president probably wishes he had that power.